added Revit 2022 SDK minus except *rvt and *rfa

SDK/Samples/GridCreation/CS/Command.cs

@@ -0,0 +1,257 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Windows.Forms;
+using System.Collections;
+using System.Collections.Generic;
+
+using Autodesk.Revit;
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+using Application = Autodesk.Revit.ApplicationServices.Application;
+using Element = Autodesk.Revit.DB.Element;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// Implements the Revit add-in interface IExternalCommand
+    /// </summary>
+    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
+    [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
+    [Autodesk.Revit.Attributes.Journaling(Autodesk.Revit.Attributes.JournalingMode.NoCommandData)]
+    public class Command : IExternalCommand
+    {
+        /// <summary>
+        /// Implement this method as an external command for Revit.
+        /// </summary>
+        /// <param name="commandData">An object that is passed to the external application 
+        /// which contains data related to the command, 
+        /// such as the application object and active view.</param>
+        /// <param name="message">A message that can be set by the external application 
+        /// which will be displayed if a failure or cancellation is returned by 
+        /// the external command.</param>
+        /// <param name="elements">A set of elements to which the external application 
+        /// can add elements that are to be highlighted in case of failure or cancellation.</param>
+        /// <returns>Return the status of the external command. 
+        /// A result of Succeeded means that the API external method functioned as expected. 
+        /// Cancelled can be used to signify that the user cancelled the external operation 
+        /// at some point. Failure should be returned if the application is unable to proceed with 
+        /// the operation.</returns>
+        public virtual Autodesk.Revit.UI.Result Execute(ExternalCommandData commandData
+            , ref string message, Autodesk.Revit.DB.ElementSet elements)
+        {
+            try
+            {
+                Document document = commandData.Application.ActiveUIDocument.Document;
+
+                // Get all selected lines and arcs 
+                CurveArray selectedCurves = GetSelectedCurves(commandData.Application.ActiveUIDocument.Document);
+
+                // Show UI
+                GridCreationOptionData gridCreationOption = new GridCreationOptionData(!selectedCurves.IsEmpty);
+                using (GridCreationOptionForm gridCreationOptForm = new GridCreationOptionForm(gridCreationOption))
+                {
+                    DialogResult result = gridCreationOptForm.ShowDialog();
+                    if (result == DialogResult.Cancel)
+                    {
+                        return Autodesk.Revit.UI.Result.Cancelled;
+                    }
+
+                    ArrayList labels = GetAllLabelsOfGrids(document);
+                    ForgeTypeId unit = GetLengthUnitType(document);
+                    switch (gridCreationOption.CreateGridsMode)
+                    {
+                        case CreateMode.Select: // Create grids with selected lines/arcs
+                            CreateWithSelectedCurvesData data = new CreateWithSelectedCurvesData(commandData.Application, selectedCurves, labels);
+                            using (CreateWithSelectedCurvesForm createWithSelected = new CreateWithSelectedCurvesForm(data))
+                            {
+                                result = createWithSelected.ShowDialog();
+                                if (result == DialogResult.OK)
+                                {
+                                    // Create grids
+                                    Transaction transaction = new Transaction(document, "CreateGridsWithSelectedCurves");
+                                    transaction.Start();
+                                    data.CreateGrids();
+                                    transaction.Commit();
+                                }  
+                            }
+                            break;
+
+                        case CreateMode.Orthogonal: // Create orthogonal grids
+                            CreateOrthogonalGridsData orthogonalData = new CreateOrthogonalGridsData(commandData.Application, unit, labels);
+                            using (CreateOrthogonalGridsForm orthogonalGridForm = new CreateOrthogonalGridsForm(orthogonalData))
+                            {
+                                result = orthogonalGridForm.ShowDialog();
+                                if (result == DialogResult.OK)
+                                {
+                                    // Create grids
+                                    Transaction transaction = new Transaction(document, "CreateOrthogonalGrids");
+                                    transaction.Start();
+                                    orthogonalData.CreateGrids();
+                                    transaction.Commit();
+                                }  
+                            }
+                            break;
+
+                        case CreateMode.RadialAndArc: // Create radial and arc grids
+                            CreateRadialAndArcGridsData radArcData = new CreateRadialAndArcGridsData(commandData.Application, unit, labels);
+                            using (CreateRadialAndArcGridsForm radArcForm = new CreateRadialAndArcGridsForm(radArcData))
+                            {
+                                result = radArcForm.ShowDialog();
+                                if (result == DialogResult.OK)
+                                {
+                                    // Create grids
+                                    Transaction transaction = new Transaction(document, "CreateRadialAndArcGrids");
+                                    transaction.Start();
+                                    radArcData.CreateGrids();
+                                    transaction.Commit();
+                                }  
+                            }
+                            break;
+                    }
+
+                    if (result == DialogResult.OK)
+                    {
+                        return Autodesk.Revit.UI.Result.Succeeded;
+                    }
+                    else
+                    {
+                        return Autodesk.Revit.UI.Result.Cancelled;
+                    }                    
+                }
+            }
+            catch (Exception ex)
+            {
+                message = ex.Message;
+                return Autodesk.Revit.UI.Result.Failed;
+            }
+        }
+
+        /// <summary>
+        /// Get all selected lines and arcs
+        /// </summary>
+        /// <param name="document">Revit's document</param>
+        /// <returns>CurveArray contains all selected lines and arcs</returns>
+        private static CurveArray GetSelectedCurves(Document document)
+        {
+            CurveArray selectedCurves = new CurveArray();
+            UIDocument newUIdocument = new UIDocument(document);
+            ElementSet elements = new ElementSet();
+            foreach (ElementId elementId in newUIdocument.Selection.GetElementIds())
+            {
+               elements.Insert(newUIdocument.Document.GetElement(elementId));
+            }
+            foreach (Autodesk.Revit.DB.Element element in elements)
+            {
+                if ((element is ModelLine) || (element is ModelArc))
+                {
+                    ModelCurve modelCurve = element as ModelCurve;
+                    Curve curve = modelCurve.GeometryCurve;
+                    if (curve != null)
+                    {
+                        selectedCurves.Append(curve);
+                    }
+                }
+                else if ((element is DetailLine) || (element is DetailArc))
+                {
+                    DetailCurve detailCurve = element as DetailCurve;
+                    Curve curve = detailCurve.GeometryCurve;
+                    if (curve != null)
+                    {
+                        selectedCurves.Append(curve);
+                    }
+                }
+            }
+
+            return selectedCurves;
+        }
+
+        /// <summary>
+        /// Get all model and detail lines/arcs within selected elements
+        /// </summary>
+        /// <param name="document">Revit's document</param>
+        /// <returns>ElementSet contains all model and detail lines/arcs within selected elements </returns>
+        public static ElementSet GetSelectedModelLinesAndArcs(Document document)
+        {
+            UIDocument newUIdocument = new UIDocument(document);
+            ElementSet elements = new ElementSet();
+            foreach (ElementId elementId in newUIdocument.Selection.GetElementIds())
+            {
+               elements.Insert(newUIdocument.Document.GetElement(elementId));
+            }
+            ElementSet tmpSet = new ElementSet();
+            foreach (Autodesk.Revit.DB.Element element in elements)
+            {
+                if ((element is ModelLine) || (element is ModelArc) || (element is DetailLine) || (element is DetailArc))
+                {
+                    tmpSet.Insert(element);
+                }
+            }
+
+            return tmpSet;
+        }
+
+        /// <summary>
+        /// Get current length display unit type
+        /// </summary>
+        /// <param name="document">Revit's document</param>
+        /// <returns>Current length display unit type</returns>
+        private static ForgeTypeId GetLengthUnitType(Document document)
+        {
+            ForgeTypeId specTypeId = SpecTypeId.Length;
+            Units projectUnit = document.GetUnits();
+            try
+            {
+                Autodesk.Revit.DB.FormatOptions formatOption = projectUnit.GetFormatOptions(specTypeId);
+                return formatOption.GetUnitTypeId();
+            }
+            catch (System.Exception /*e*/)
+            {
+                return UnitTypeId.Feet;
+            }
+        }
+
+        /// <summary>
+        /// Get all grid labels in current document
+        /// </summary>
+        /// <param name="document">Revit's document</param>
+        /// <returns>ArrayList contains all grid labels in current document</returns>
+        private static ArrayList GetAllLabelsOfGrids(Document document)
+        {
+            ArrayList labels = new ArrayList();
+            FilteredElementIterator itor = new FilteredElementCollector(document).OfClass(typeof(Grid)).GetElementIterator();
+            itor.Reset();
+            for (; itor.MoveNext(); )
+            {
+                Grid grid = itor.Current as Grid;
+                if (null != grid)
+                {
+                    labels.Add(grid.Name);
+                }
+            }
+
+            return labels;
+        }
+    }
+}
+

SDK/Samples/GridCreation/CS/CreateGridsData.cs

@@ -0,0 +1,350 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Collections;
+using System.Windows.Forms;
+
+using Autodesk.Revit;
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+using Application = Autodesk.Revit.ApplicationServices.Application;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// Base class of all grid creation data class
+    /// </summary>
+    public class CreateGridsData
+    {
+        #region Fields
+        /// <summary>
+        /// The active document of Revit
+        /// </summary>
+        protected Autodesk.Revit.DB.Document m_revitDoc;
+        /// <summary>
+        /// Document Creation object to create new elements 
+        /// </summary>
+        protected Autodesk.Revit.Creation.Document m_docCreator;
+        /// <summary>
+        /// Application Creation object to create new elements
+        /// </summary>
+        protected Autodesk.Revit.Creation.Application m_appCreator;
+        /// <summary>
+        /// Array list contains all grid labels in current document
+        /// </summary>
+        private ArrayList m_labelsList;
+        /// <summary>
+        /// Current display unit type
+        /// </summary>
+        protected ForgeTypeId m_unit;
+        /// <summary>
+        /// Resource manager
+        /// </summary>
+        protected static System.Resources.ResourceManager resManager = Properties.Resources.ResourceManager;
+        #endregion
+
+        #region Properties
+        /// <summary>
+        /// Current display unit type
+        /// </summary>
+        public ForgeTypeId Unit
+        {
+            get
+            {
+                return m_unit;
+            }
+        }
+
+        /// <summary>
+        /// Get array list contains all grid labels in current document
+        /// </summary>
+        public ArrayList LabelsList
+        {
+            get
+            {
+                return m_labelsList;
+            }
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// Constructor without display unit type
+        /// </summary>
+        /// <param name="application">Revit application</param>
+        /// <param name="labels">All existing labels in Revit's document</param>
+        public CreateGridsData(UIApplication application, ArrayList labels)
+        {
+            m_revitDoc = application.ActiveUIDocument.Document;
+            m_appCreator = application.Application.Create;
+            m_docCreator = application.ActiveUIDocument.Document.Create;
+            m_labelsList = labels;
+        }
+
+        /// <summary>
+        /// Constructor with display unit type
+        /// </summary>
+        /// <param name="application">Revit application</param>
+        /// <param name="labels">All existing labels in Revit's document</param>
+        /// <param name="unit">Current length display unit type</param>
+        public CreateGridsData(UIApplication application, ArrayList labels, ForgeTypeId unit)
+        {
+            m_revitDoc = application.ActiveUIDocument.Document;
+            m_appCreator = application.Application.Create;
+            m_docCreator = application.ActiveUIDocument.Document.Create;
+            m_labelsList = labels;
+            m_unit = unit;
+        }
+
+        /// <summary>
+        /// Get the line to create grid according to the specified bubble location
+        /// </summary>
+        /// <param name="line">The original selected line</param>
+        /// <param name="bubLoc">bubble location</param>
+        /// <returns>The line to create grid</returns>
+        protected Line TransformLine(Line line, BubbleLocation bubLoc)
+        {
+            Line lineToCreate;
+
+            // Create grid according to the bubble location
+            if (bubLoc == BubbleLocation.StartPoint)
+            {
+                lineToCreate = line;
+            }
+            else
+            {
+                Autodesk.Revit.DB.XYZ startPoint = line.GetEndPoint(1);
+                Autodesk.Revit.DB.XYZ endPoint = line.GetEndPoint(0);
+                lineToCreate = NewLine(startPoint, endPoint);
+            }
+
+            return lineToCreate;
+        }
+
+        /// <summary>
+        /// Get the arc to create grid according to the specified bubble location
+        /// </summary>
+        /// <param name="arc">The original selected line</param>
+        /// <param name="bubLoc">bubble location</param>
+        /// <returns>The arc to create grid</returns>
+        protected Arc TransformArc(Arc arc, BubbleLocation bubLoc)
+        {
+            Arc arcToCreate;
+
+            if (bubLoc == BubbleLocation.StartPoint)
+            {
+                arcToCreate = arc;
+            }
+            else
+            {
+                // Get start point, end point of the arc and the middle point on it 
+                Autodesk.Revit.DB.XYZ startPoint = arc.GetEndPoint(0);
+                Autodesk.Revit.DB.XYZ endPoint = arc.GetEndPoint(1);
+                bool clockwise = (arc.Normal.Z == -1);
+
+                // Get start angel and end angel of arc
+                double startDegree = arc.GetEndParameter(0);
+                double endDegree = arc.GetEndParameter(1);
+
+                // Handle the case that the arc is clockwise
+                if (clockwise && startDegree > 0 && endDegree > 0)
+                {
+                    startDegree = 2 * Values.PI - startDegree;
+                    endDegree = 2 * Values.PI - endDegree;
+                }
+                else if (clockwise && startDegree < 0)
+                {
+                    double temp = endDegree;
+                    endDegree = -1 * startDegree;
+                    startDegree = -1 * temp;
+                }
+
+                double sumDegree = (startDegree + endDegree) / 2;
+                while (sumDegree > 2 * Values.PI)
+                {
+                    sumDegree -= 2 * Values.PI;
+                }
+
+                while (sumDegree < -2 * Values.PI)
+                {
+                    sumDegree += 2 * Values.PI;
+                }
+
+                Autodesk.Revit.DB.XYZ midPoint = new Autodesk.Revit.DB.XYZ(arc.Center.X + arc.Radius * Math.Cos(sumDegree),
+                    arc.Center.Y + arc.Radius * Math.Sin(sumDegree), 0);
+
+                arcToCreate = Arc.Create(endPoint, startPoint, midPoint);
+            }
+
+            return arcToCreate;
+        }
+
+        /// <summary>
+        /// Get the arc to create grid according to the specified bubble location
+        /// </summary>
+        /// <param name="origin">Arc grid's origin</param>
+        /// <param name="radius">Arc grid's radius</param>
+        /// <param name="startDegree">Arc grid's start degree</param>
+        /// <param name="endDegree">Arc grid's end degree</param>
+        /// <param name="bubLoc">Arc grid's Bubble location</param>
+        /// <returns>The expected arc to create grid</returns>
+        protected Arc TransformArc(Autodesk.Revit.DB.XYZ origin, double radius, double startDegree, double endDegree,
+            BubbleLocation bubLoc)
+        {
+            Arc arcToCreate;
+            // Get start point and end point of the arc and the middle point on the arc
+            Autodesk.Revit.DB.XYZ startPoint = new Autodesk.Revit.DB.XYZ(origin.X + radius * Math.Cos(startDegree),
+                origin.Y + radius * Math.Sin(startDegree), origin.Z);
+            Autodesk.Revit.DB.XYZ midPoint = new Autodesk.Revit.DB.XYZ(origin.X + radius * Math.Cos((startDegree + endDegree) / 2),
+                origin.Y + radius * Math.Sin((startDegree + endDegree) / 2), origin.Z);
+            Autodesk.Revit.DB.XYZ endPoint = new Autodesk.Revit.DB.XYZ(origin.X + radius * Math.Cos(endDegree),
+                origin.Y + radius * Math.Sin(endDegree), origin.Z);
+
+            if (bubLoc == BubbleLocation.StartPoint)
+            {
+                arcToCreate = Arc.Create(startPoint, endPoint, midPoint);
+            }
+            else
+            {
+                arcToCreate = Arc.Create(endPoint, startPoint, midPoint);
+            }
+
+            return arcToCreate;
+        }
+
+        /// <summary>
+        /// Split a circle into the upper and lower parts
+        /// </summary>
+        /// <param name="arc">Arc to be split</param>
+        /// <param name="upperArc">Upper arc of the circle</param>
+        /// <param name="lowerArc">Lower arc of the circle</param>
+        /// <param name="bubLoc">bubble location</param>
+        protected void TransformCircle(Arc arc, ref Arc upperArc, ref Arc lowerArc, BubbleLocation bubLoc)
+        {
+            Autodesk.Revit.DB.XYZ center = arc.Center;
+            double radius = arc.Radius;
+            Autodesk.Revit.DB.XYZ XRightPoint = new Autodesk.Revit.DB.XYZ(center.X + radius, center.Y, 0);
+            Autodesk.Revit.DB.XYZ XLeftPoint = new Autodesk.Revit.DB.XYZ(center.X - radius, center.Y, 0);
+            Autodesk.Revit.DB.XYZ YUpperPoint = new Autodesk.Revit.DB.XYZ(center.X, center.Y + radius, 0);
+            Autodesk.Revit.DB.XYZ YLowerPoint = new Autodesk.Revit.DB.XYZ(center.X, center.Y - radius, 0);
+            if (bubLoc == BubbleLocation.StartPoint)
+            {
+                upperArc = Arc.Create(XRightPoint, XLeftPoint, YUpperPoint);
+                lowerArc = Arc.Create(XLeftPoint, XRightPoint, YLowerPoint);
+            }
+            else
+            {
+                upperArc = Arc.Create(XLeftPoint, XRightPoint, YUpperPoint);
+                lowerArc = Arc.Create(XRightPoint, XLeftPoint, YLowerPoint);
+            }
+        }
+
+        /// <summary>
+        /// Create a new bound line
+        /// </summary>
+        /// <param name="start">start point of line</param>
+        /// <param name="end">end point of line</param>
+        /// <returns></returns>
+        protected Line NewLine(Autodesk.Revit.DB.XYZ start, Autodesk.Revit.DB.XYZ end)
+        {
+            return Line.CreateBound(start, end);
+        }
+
+        /// <summary>
+        /// Create a grid with a line
+        /// </summary>
+        /// <param name="line">Line to create grid</param>
+        /// <returns>Newly created grid</returns>
+        protected Grid NewGrid(Line line)
+        {
+           return Grid.Create(m_revitDoc, line);
+        }
+
+        /// <summary>
+        /// Create a grid with an arc
+        /// </summary>
+        /// <param name="arc">Arc to create grid</param>
+        /// <returns>Newly created grid</returns>
+        protected Grid NewGrid(Arc arc)
+        {
+           return Grid.Create(m_revitDoc, arc);
+        }
+
+        /// <summary>
+        /// Create linear grid
+        /// </summary>
+        /// <param name="line">The linear curve to be transferred to grid</param>
+        /// <returns>The newly created grid</returns>
+        /// 
+        protected Grid CreateLinearGrid(Line line)
+        {
+           return Grid.Create(m_revitDoc, line);
+        }
+
+        /// <summary>
+        /// Create batch of grids with curves
+        /// </summary>
+        /// <param name="curves">Curves used to create grids</param>
+        protected void CreateGrids(CurveArray curves)
+        {
+           foreach (Curve c in curves)
+           {
+              Line line = c as Line;
+              Arc arc = c as Arc;
+
+              if (line != null)
+              {
+                 Grid.Create(m_revitDoc, line);
+              }
+
+              if (arc != null)
+              {
+                 Grid.Create(m_revitDoc, arc);
+              }
+           }
+        }
+
+        /// <summary>
+        /// Add curve to curve array for batch creation
+        /// </summary>
+        /// <param name="curves">curve array stores all curves for batch creation</param>
+        /// <param name="curve">curve to be added</param>
+        public static void AddCurveForBatchCreation(ref CurveArray curves, Curve curve)
+        {
+            curves.Append(curve);
+        }
+
+        /// <summary>
+        /// Show a message box
+        /// </summary>
+        /// <param name="message">Message</param>
+        /// <param name="caption">title of message box</param>
+        public static void ShowMessage(String message, String caption)
+        {
+            TaskDialog.Show(caption, message, TaskDialogCommonButtons.Ok);
+        }
+        #endregion
+    }
+}

SDK/Samples/GridCreation/CS/CreateOrthogonalGridsData.cs

@@ -0,0 +1,436 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Collections;
+using System.Windows.Forms;
+
+using Autodesk.Revit;
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+using Application = Autodesk.Revit.ApplicationServices.Application;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// Data class which stores information for creating orthogonal grids
+    /// </summary>
+    public class CreateOrthogonalGridsData : CreateGridsData
+    {
+        #region Fields
+        // X coordinate of origin
+        private double m_xOrigin;
+        // Y coordinate of origin
+        private double m_yOrigin;
+        // Spacing between horizontal grids
+        private double m_xSpacing; 
+        // Spacing between vertical grids
+        private double m_ySpacing;
+        // Number of horizontal grids
+        private uint m_xNumber;
+        // Number of vertical grids
+        private uint m_yNumber;
+        // Bubble location of horizontal grids
+        private BubbleLocation m_xBubbleLoc;
+        // Bubble location of vertical grids
+        private BubbleLocation m_yBubbleLoc;
+        // Label of first horizontal grid
+        private String m_xFirstLabel;
+        // Label of first vertical grid
+        private String m_yFirstLabel;
+        #endregion
+
+        #region Properties
+        /// <summary>
+        /// X coordinate of origin
+        /// </summary>
+        public double XOrigin
+        {
+            get
+            {
+                return m_xOrigin;
+            }
+            set 
+            {
+                m_xOrigin = value; 
+            }
+        }
+
+        /// <summary>
+        /// Y coordinate of origin
+        /// </summary>
+        public double YOrigin
+        {
+            get
+            {
+                return m_yOrigin;
+            }
+            set
+            {
+                m_yOrigin = value;
+            }
+        }
+
+        /// <summary>
+        /// Spacing between horizontal grids
+        /// </summary>
+        public double XSpacing
+        {
+            get
+            {
+                return m_xSpacing;
+            }
+            set 
+            { 
+                m_xSpacing = value; 
+            }
+        }
+
+        /// <summary>
+        /// Spacing between vertical grids
+        /// </summary>
+        public double YSpacing
+        {
+            get
+            {
+                return m_ySpacing;
+            }
+            set 
+            { 
+                m_ySpacing = value; 
+            }
+        }
+
+        /// <summary>
+        /// Number of horizontal grids
+        /// </summary>
+        public uint XNumber
+        {
+            get
+            {
+                return m_xNumber;
+            }
+            set 
+            { 
+                m_xNumber = value; 
+            }
+        }
+
+        /// <summary>
+        /// Number of vertical grids
+        /// </summary>
+        public uint YNumber
+        {
+            get
+            {
+                return m_yNumber;
+            }
+            set 
+            { 
+                m_yNumber = value; 
+            }
+        }
+
+        /// <summary>
+        /// Bubble location of horizontal grids
+        /// </summary>
+        public BubbleLocation XBubbleLoc
+        {
+            get
+            {
+                return m_xBubbleLoc;
+            }
+            set 
+            { 
+                m_xBubbleLoc = value; 
+            }
+        }
+
+        /// <summary>
+        /// Bubble location of vertical grids
+        /// </summary>
+        public BubbleLocation YBubbleLoc
+        {
+            get
+            {
+                return m_yBubbleLoc;
+            }
+            set 
+            { 
+                m_yBubbleLoc = value; 
+            }
+        }
+
+        /// <summary>
+        /// Label of first horizontal grid
+        /// </summary>
+        public String XFirstLabel
+        {
+            get
+            {
+                return m_xFirstLabel;
+            }
+            set 
+            { 
+                m_xFirstLabel = value; 
+            }
+        }
+
+        /// <summary>
+        /// Label of first vertical grid
+        /// </summary>
+        public String YFirstLabel
+        {
+            get
+            {
+                return m_yFirstLabel;
+            }
+            set 
+            { 
+                m_yFirstLabel = value; 
+            }
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="application">Application object</param>
+        /// <param name="unit">Current length display unit type</param>
+        /// <param name="labels">All existing labels in Revit's document</param>
+        public CreateOrthogonalGridsData(UIApplication application, ForgeTypeId unit, ArrayList labels)
+            : base(application, labels, unit)
+        {
+        }
+
+        /// <summary>
+        /// Create grids
+        /// </summary>
+        public void CreateGrids()
+        {
+            ArrayList failureReasons = new ArrayList();
+            if (CreateXGrids(ref failureReasons) + CreateYGrids(ref failureReasons) != 0)
+            {
+                String failureReason = resManager.GetString("FailedToCreateGrids");
+                if (failureReasons.Count != 0)
+                {
+                    failureReason += resManager.GetString("Reasons") + "\r";
+                    failureReason += "\r";
+                    foreach (String reason in failureReasons)
+                    {
+                        failureReason += reason + "\r";
+                    }
+                }
+                
+                failureReason += "\r" + resManager.GetString("AjustValues");
+
+                ShowMessage(failureReason, resManager.GetString("FailureCaptionCreateGrids"));
+            }
+        }
+
+        /// <summary>
+        /// Create horizontal grids
+        /// </summary>
+        /// <param name="failureReasons">ArrayList contains failure reasons</param>
+        /// <returns>Number of grids failed to create</returns>
+        private int CreateXGrids(ref ArrayList failureReasons)
+        {
+            int errorCount = 0;
+
+            // Curve array which stores all curves for batch creation
+            CurveArray curves = new CurveArray();
+
+            for (int i = 0; i < m_xNumber; ++i)
+            {
+                Autodesk.Revit.DB.XYZ startPoint;
+                Autodesk.Revit.DB.XYZ endPoint;
+                Line line;
+
+                try
+                {
+                    if (m_yNumber != 0)
+                    {
+                        // Grids will have an extension distance of m_ySpacing / 2
+                        startPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin - m_ySpacing / 2, m_yOrigin + i * m_xSpacing, 0);
+                        endPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + (m_yNumber - 1) * m_ySpacing + m_ySpacing / 2, m_yOrigin + i * m_xSpacing, 0);
+                    }
+                    else
+                    {
+                        startPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin, m_yOrigin + i * m_xSpacing, 0);
+                        endPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + m_xSpacing / 2, m_yOrigin + i * m_xSpacing, 0);
+
+                    }
+
+                    try
+                    {
+                        // Create a line according to the bubble location
+                        if (m_xBubbleLoc == BubbleLocation.StartPoint)
+                        {
+                            line = NewLine(startPoint, endPoint);
+                        }
+                        else
+                        {
+                            line = NewLine(endPoint, startPoint);
+                        }
+                    }
+                    catch (System.ArgumentException)
+                    {
+                        String failureReason = resManager.GetString("SpacingsTooSmall");
+                        if (!failureReasons.Contains(failureReason))
+                        {
+                            failureReasons.Add(failureReason);
+                        }
+                        errorCount++;
+                        continue;
+                    }
+
+                    if (i == 0)
+                    {
+                        Grid grid;
+                        // Create grid with line
+                        grid = NewGrid(line);
+
+                        try
+                        {
+                            // Set the label of first horizontal grid
+                            grid.Name = m_xFirstLabel;
+                        }
+                        catch (System.ArgumentException)
+                        {
+                            ShowMessage(resManager.GetString("FailedToSetLabel") + m_xFirstLabel + "!",
+                                        resManager.GetString("FailureCaptionSetLabel"));
+                        }
+                    }
+                    else
+                    {
+                        // Add the line to curve array
+                        curves.Append(line);
+                    }
+                }
+                catch (Exception)
+                {
+                    ++errorCount;
+                    continue;
+                }                
+            }
+
+            // Create grids with curve array
+            CreateGrids(curves);
+
+            return errorCount;
+        }
+
+        /// <summary>
+        /// Create vertical grids
+        /// </summary>
+        /// <param name="failureReasons">ArrayList contains failure reasons</param>
+        /// <returns>Number of grids failed to create</returns>
+        private int CreateYGrids(ref ArrayList failureReasons)
+        {
+            int errorCount = 0;
+
+            // Curve array which stores all curves for batch creation
+            CurveArray curves = new CurveArray();
+
+            for (int j = 0; j < m_yNumber; ++j)
+            {
+                Autodesk.Revit.DB.XYZ startPoint;
+                Autodesk.Revit.DB.XYZ endPoint;
+                Line line;
+
+                try
+                {
+                    if (m_xNumber != 0)
+                    {
+                        startPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + j * m_ySpacing, m_yOrigin - m_xSpacing / 2, 0);
+                        endPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + j * m_ySpacing, m_yOrigin + (m_xNumber - 1) * m_xSpacing + m_xSpacing / 2, 0);
+                    }
+                    else
+                    {
+                        startPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + j * m_ySpacing, m_yOrigin, 0);
+                        endPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + j * m_ySpacing, m_yOrigin + m_ySpacing / 2, 0);
+                    }
+
+                    try
+                    {
+                        // Create a line according to the bubble location
+                        if (m_yBubbleLoc == BubbleLocation.StartPoint)
+                        {
+                            line = NewLine(startPoint, endPoint);
+                        }
+                        else
+                        {
+                            line = NewLine(endPoint, startPoint);
+                        }
+                    }
+                    catch (System.ArgumentException)
+                    {
+                        String failureReason = resManager.GetString("SpacingsTooSmall");
+                        if (!failureReasons.Contains(failureReason))
+                        {
+                            failureReasons.Add(failureReason);
+                        }
+                        errorCount++;
+                        continue;
+                    }
+
+                    if (j == 0)
+                    {
+                        Grid grid;
+                        // Create grid with line
+                        grid = NewGrid(line);
+
+                        try
+                        {
+                            // Set label of first vertical grid
+                            grid.Name = m_yFirstLabel;
+                        }
+                        catch (System.ArgumentException)
+                        {
+                            ShowMessage(resManager.GetString("FailedToSetLabel") + m_yFirstLabel + "!",
+                                        resManager.GetString("FailureCaptionSetLabel"));
+                        }
+                    }
+                    else
+                    {
+                        // Add the line to curve array
+                        curves.Append(line);
+                    }
+                }
+                catch (Exception)
+                {
+                    ++errorCount;
+                    continue;
+                }
+            }
+
+            // Create grids with curves
+            CreateGrids(curves);
+
+            return errorCount;
+        }
+        #endregion
+    }
+}

SDK/Samples/GridCreation/CS/CreateOrthogonalGridsForm.Designer.cs

@@ -0,0 +1,425 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    partial class CreateOrthogonalGridsForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.groupBox1 = new System.Windows.Forms.GroupBox();
+            this.labelYCoordUnit = new System.Windows.Forms.Label();
+            this.labelXCoordUnit = new System.Windows.Forms.Label();
+            this.textBoxYCoord = new System.Windows.Forms.TextBox();
+            this.textBoxXCoord = new System.Windows.Forms.TextBox();
+            this.label2 = new System.Windows.Forms.Label();
+            this.label1 = new System.Windows.Forms.Label();
+            this.textBoxYNumber = new System.Windows.Forms.TextBox();
+            this.label3 = new System.Windows.Forms.Label();
+            this.textBoxXNumber = new System.Windows.Forms.TextBox();
+            this.groupBox2 = new System.Windows.Forms.GroupBox();
+            this.labelUnitY = new System.Windows.Forms.Label();
+            this.textBoxYSpacing = new System.Windows.Forms.TextBox();
+            this.textBoxYFirstLabel = new System.Windows.Forms.TextBox();
+            this.comboBoxYBubbleLocation = new System.Windows.Forms.ComboBox();
+            this.label10 = new System.Windows.Forms.Label();
+            this.label5 = new System.Windows.Forms.Label();
+            this.label9 = new System.Windows.Forms.Label();
+            this.label4 = new System.Windows.Forms.Label();
+            this.groupBox3 = new System.Windows.Forms.GroupBox();
+            this.labelUnitX = new System.Windows.Forms.Label();
+            this.textBoxXSpacing = new System.Windows.Forms.TextBox();
+            this.textBoxXFirstLabel = new System.Windows.Forms.TextBox();
+            this.comboBoxXBubbleLocation = new System.Windows.Forms.ComboBox();
+            this.label6 = new System.Windows.Forms.Label();
+            this.label7 = new System.Windows.Forms.Label();
+            this.label8 = new System.Windows.Forms.Label();
+            this.buttonCreate = new System.Windows.Forms.Button();
+            this.buttonCancel = new System.Windows.Forms.Button();
+            this.groupBox1.SuspendLayout();
+            this.groupBox2.SuspendLayout();
+            this.groupBox3.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // groupBox1
+            // 
+            this.groupBox1.Controls.Add(this.labelYCoordUnit);
+            this.groupBox1.Controls.Add(this.labelXCoordUnit);
+            this.groupBox1.Controls.Add(this.textBoxYCoord);
+            this.groupBox1.Controls.Add(this.textBoxXCoord);
+            this.groupBox1.Controls.Add(this.label2);
+            this.groupBox1.Controls.Add(this.label1);
+            this.groupBox1.Location = new System.Drawing.Point(13, 12);
+            this.groupBox1.Name = "groupBox1";
+            this.groupBox1.Size = new System.Drawing.Size(520, 55);
+            this.groupBox1.TabIndex = 0;
+            this.groupBox1.TabStop = false;
+            this.groupBox1.Text = "Origin of the Grids";
+            // 
+            // labelYCoordUnit
+            // 
+            this.labelYCoordUnit.Location = new System.Drawing.Point(484, 23);
+            this.labelYCoordUnit.Name = "labelYCoordUnit";
+            this.labelYCoordUnit.Size = new System.Drawing.Size(23, 13);
+            this.labelYCoordUnit.TabIndex = 7;
+            // 
+            // labelXCoordUnit
+            // 
+            this.labelXCoordUnit.Location = new System.Drawing.Point(227, 23);
+            this.labelXCoordUnit.Name = "labelXCoordUnit";
+            this.labelXCoordUnit.Size = new System.Drawing.Size(23, 13);
+            this.labelXCoordUnit.TabIndex = 7;
+            // 
+            // textBoxYCoord
+            // 
+            this.textBoxYCoord.Location = new System.Drawing.Point(385, 20);
+            this.textBoxYCoord.Name = "textBoxYCoord";
+            this.textBoxYCoord.Size = new System.Drawing.Size(98, 20);
+            this.textBoxYCoord.TabIndex = 1;
+            this.textBoxYCoord.Tag = "0";
+            this.textBoxYCoord.Text = "0";
+            // 
+            // textBoxXCoord
+            // 
+            this.textBoxXCoord.Location = new System.Drawing.Point(109, 20);
+            this.textBoxXCoord.Name = "textBoxXCoord";
+            this.textBoxXCoord.Size = new System.Drawing.Size(112, 20);
+            this.textBoxXCoord.TabIndex = 0;
+            this.textBoxXCoord.Tag = "0";
+            this.textBoxXCoord.Text = "0";
+            // 
+            // label2
+            // 
+            this.label2.Location = new System.Drawing.Point(261, 24);
+            this.label2.Name = "label2";
+            this.label2.Size = new System.Drawing.Size(122, 13);
+            this.label2.TabIndex = 0;
+            this.label2.Text = "Y coordinate:";
+            // 
+            // label1
+            // 
+            this.label1.Location = new System.Drawing.Point(7, 24);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(95, 13);
+            this.label1.TabIndex = 0;
+            this.label1.Text = "X coordinate:";
+            // 
+            // textBoxYNumber
+            // 
+            this.textBoxYNumber.Location = new System.Drawing.Point(385, 24);
+            this.textBoxYNumber.Name = "textBoxYNumber";
+            this.textBoxYNumber.Size = new System.Drawing.Size(120, 20);
+            this.textBoxYNumber.TabIndex = 1;
+            this.textBoxYNumber.Tag = "3";
+            this.textBoxYNumber.Text = "3";
+            // 
+            // label3
+            // 
+            this.label3.Location = new System.Drawing.Point(261, 27);
+            this.label3.Name = "label3";
+            this.label3.Size = new System.Drawing.Size(122, 13);
+            this.label3.TabIndex = 7;
+            this.label3.Text = "Number:";
+            // 
+            // textBoxXNumber
+            // 
+            this.textBoxXNumber.Location = new System.Drawing.Point(385, 23);
+            this.textBoxXNumber.Name = "textBoxXNumber";
+            this.textBoxXNumber.Size = new System.Drawing.Size(120, 20);
+            this.textBoxXNumber.TabIndex = 1;
+            this.textBoxXNumber.Tag = "3";
+            this.textBoxXNumber.Text = "3";
+            // 
+            // groupBox2
+            // 
+            this.groupBox2.Controls.Add(this.labelUnitY);
+            this.groupBox2.Controls.Add(this.textBoxYNumber);
+            this.groupBox2.Controls.Add(this.textBoxYSpacing);
+            this.groupBox2.Controls.Add(this.textBoxYFirstLabel);
+            this.groupBox2.Controls.Add(this.label3);
+            this.groupBox2.Controls.Add(this.comboBoxYBubbleLocation);
+            this.groupBox2.Controls.Add(this.label10);
+            this.groupBox2.Controls.Add(this.label5);
+            this.groupBox2.Controls.Add(this.label9);
+            this.groupBox2.Location = new System.Drawing.Point(14, 165);
+            this.groupBox2.Name = "groupBox2";
+            this.groupBox2.Size = new System.Drawing.Size(519, 85);
+            this.groupBox2.TabIndex = 2;
+            this.groupBox2.TabStop = false;
+            this.groupBox2.Text = "Y direction Grids";
+            // 
+            // labelUnitY
+            // 
+            this.labelUnitY.Location = new System.Drawing.Point(227, 26);
+            this.labelUnitY.Name = "labelUnitY";
+            this.labelUnitY.Size = new System.Drawing.Size(23, 13);
+            this.labelUnitY.TabIndex = 7;
+            // 
+            // textBoxYSpacing
+            // 
+            this.textBoxYSpacing.Location = new System.Drawing.Point(110, 24);
+            this.textBoxYSpacing.Name = "textBoxYSpacing";
+            this.textBoxYSpacing.Size = new System.Drawing.Size(112, 20);
+            this.textBoxYSpacing.TabIndex = 0;
+            this.textBoxYSpacing.Tag = "10.0";
+            this.textBoxYSpacing.Text = 10.0.ToString("0.0");
+            // 
+            // textBoxYFirstLabel
+            // 
+            this.textBoxYFirstLabel.Location = new System.Drawing.Point(385, 53);
+            this.textBoxYFirstLabel.Name = "textBoxYFirstLabel";
+            this.textBoxYFirstLabel.Size = new System.Drawing.Size(120, 20);
+            this.textBoxYFirstLabel.TabIndex = 3;
+            this.textBoxYFirstLabel.Tag = "A";
+            this.textBoxYFirstLabel.Text = "A";
+            // 
+            // comboBoxYBubbleLocation
+            // 
+            this.comboBoxYBubbleLocation.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.comboBoxYBubbleLocation.FormattingEnabled = true;
+            this.comboBoxYBubbleLocation.Items.AddRange(new object[] {
+            "At start point of lines",
+            "At end point of lines"});
+            this.comboBoxYBubbleLocation.Location = new System.Drawing.Point(108, 53);
+            this.comboBoxYBubbleLocation.Name = "comboBoxYBubbleLocation";
+            this.comboBoxYBubbleLocation.Size = new System.Drawing.Size(146, 21);
+            this.comboBoxYBubbleLocation.TabIndex = 2;
+            // 
+            // label10
+            // 
+            this.label10.Location = new System.Drawing.Point(7, 55);
+            this.label10.Name = "label10";
+            this.label10.Size = new System.Drawing.Size(95, 13);
+            this.label10.TabIndex = 6;
+            this.label10.Text = "Bubble location:";
+            // 
+            // label5
+            // 
+            this.label5.Location = new System.Drawing.Point(6, 26);
+            this.label5.Name = "label5";
+            this.label5.Size = new System.Drawing.Size(95, 13);
+            this.label5.TabIndex = 7;
+            this.label5.Text = "Spacing:";
+            // 
+            // label9
+            // 
+            this.label9.Location = new System.Drawing.Point(261, 55);
+            this.label9.Name = "label9";
+            this.label9.Size = new System.Drawing.Size(122, 13);
+            this.label9.TabIndex = 6;
+            this.label9.Text = "Label of first grid:";
+            // 
+            // label4
+            // 
+            this.label4.Location = new System.Drawing.Point(261, 26);
+            this.label4.Name = "label4";
+            this.label4.Size = new System.Drawing.Size(122, 13);
+            this.label4.TabIndex = 6;
+            this.label4.Text = "Number:";
+            // 
+            // groupBox3
+            // 
+            this.groupBox3.Controls.Add(this.labelUnitX);
+            this.groupBox3.Controls.Add(this.textBoxXNumber);
+            this.groupBox3.Controls.Add(this.textBoxXSpacing);
+            this.groupBox3.Controls.Add(this.textBoxXFirstLabel);
+            this.groupBox3.Controls.Add(this.comboBoxXBubbleLocation);
+            this.groupBox3.Controls.Add(this.label6);
+            this.groupBox3.Controls.Add(this.label7);
+            this.groupBox3.Controls.Add(this.label4);
+            this.groupBox3.Controls.Add(this.label8);
+            this.groupBox3.Location = new System.Drawing.Point(13, 73);
+            this.groupBox3.Name = "groupBox3";
+            this.groupBox3.Size = new System.Drawing.Size(520, 86);
+            this.groupBox3.TabIndex = 1;
+            this.groupBox3.TabStop = false;
+            this.groupBox3.Text = "X direction Grids";
+            // 
+            // labelUnitX
+            // 
+            this.labelUnitX.Location = new System.Drawing.Point(227, 25);
+            this.labelUnitX.Name = "labelUnitX";
+            this.labelUnitX.Size = new System.Drawing.Size(23, 13);
+            this.labelUnitX.TabIndex = 7;
+            // 
+            // textBoxXSpacing
+            // 
+            this.textBoxXSpacing.Location = new System.Drawing.Point(109, 23);
+            this.textBoxXSpacing.Name = "textBoxXSpacing";
+            this.textBoxXSpacing.Size = new System.Drawing.Size(112, 20);
+            this.textBoxXSpacing.TabIndex = 0;
+            this.textBoxXSpacing.Tag = "10.0";
+            this.textBoxXSpacing.Text = 10.0.ToString("0.0");
+            // 
+            // textBoxXFirstLabel
+            // 
+            this.textBoxXFirstLabel.Location = new System.Drawing.Point(385, 53);
+            this.textBoxXFirstLabel.Name = "textBoxXFirstLabel";
+            this.textBoxXFirstLabel.Size = new System.Drawing.Size(120, 20);
+            this.textBoxXFirstLabel.TabIndex = 3;
+            this.textBoxXFirstLabel.Tag = "";
+            this.textBoxXFirstLabel.Text = "1";
+            // 
+            // comboBoxXBubbleLocation
+            // 
+            this.comboBoxXBubbleLocation.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.comboBoxXBubbleLocation.FormattingEnabled = true;
+            this.comboBoxXBubbleLocation.Items.AddRange(new object[] {
+            "At start point of lines",
+            "At end point of lines"});
+            this.comboBoxXBubbleLocation.Location = new System.Drawing.Point(108, 53);
+            this.comboBoxXBubbleLocation.Name = "comboBoxXBubbleLocation";
+            this.comboBoxXBubbleLocation.Size = new System.Drawing.Size(147, 21);
+            this.comboBoxXBubbleLocation.TabIndex = 2;
+            // 
+            // label6
+            // 
+            this.label6.Location = new System.Drawing.Point(7, 25);
+            this.label6.Name = "label6";
+            this.label6.Size = new System.Drawing.Size(95, 13);
+            this.label6.TabIndex = 6;
+            this.label6.Text = "Spacing:";
+            // 
+            // label7
+            // 
+            this.label7.Location = new System.Drawing.Point(7, 55);
+            this.label7.Name = "label7";
+            this.label7.Size = new System.Drawing.Size(95, 13);
+            this.label7.TabIndex = 6;
+            this.label7.Text = "Bubble location:";
+            // 
+            // label8
+            // 
+            this.label8.Location = new System.Drawing.Point(261, 55);
+            this.label8.Name = "label8";
+            this.label8.Size = new System.Drawing.Size(122, 13);
+            this.label8.TabIndex = 6;
+            this.label8.Text = "Label of first grid:";
+            // 
+            // buttonCreate
+            // 
+            this.buttonCreate.DialogResult = System.Windows.Forms.DialogResult.OK;
+            this.buttonCreate.Location = new System.Drawing.Point(327, 269);
+            this.buttonCreate.Name = "buttonCreate";
+            this.buttonCreate.Size = new System.Drawing.Size(94, 23);
+            this.buttonCreate.TabIndex = 3;
+            this.buttonCreate.Text = "Create &Grids";
+            this.buttonCreate.UseVisualStyleBackColor = true;
+            this.buttonCreate.Click += new System.EventHandler(this.buttonCreate_Click);
+            // 
+            // buttonCancel
+            // 
+            this.buttonCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+            this.buttonCancel.Location = new System.Drawing.Point(439, 269);
+            this.buttonCancel.Name = "buttonCancel";
+            this.buttonCancel.Size = new System.Drawing.Size(94, 23);
+            this.buttonCancel.TabIndex = 4;
+            this.buttonCancel.Text = "&Cancel";
+            this.buttonCancel.UseVisualStyleBackColor = true;
+            // 
+            // CreateOrthogonalGridsForm
+            // 
+            this.AcceptButton = this.buttonCreate;
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.CancelButton = this.buttonCancel;
+            this.ClientSize = new System.Drawing.Size(545, 304);
+            this.Controls.Add(this.buttonCancel);
+            this.Controls.Add(this.buttonCreate);
+            this.Controls.Add(this.groupBox3);
+            this.Controls.Add(this.groupBox2);
+            this.Controls.Add(this.groupBox1);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "CreateOrthogonalGridsForm";
+            this.ShowIcon = false;
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Create Orthogonal Grids";
+            this.groupBox1.ResumeLayout(false);
+            this.groupBox1.PerformLayout();
+            this.groupBox2.ResumeLayout(false);
+            this.groupBox2.PerformLayout();
+            this.groupBox3.ResumeLayout(false);
+            this.groupBox3.PerformLayout();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.GroupBox groupBox1;
+        private System.Windows.Forms.TextBox textBoxYCoord;
+        private System.Windows.Forms.TextBox textBoxXCoord;
+        private System.Windows.Forms.Label label2;
+        private System.Windows.Forms.Label label1;
+        private System.Windows.Forms.TextBox textBoxYNumber;
+        private System.Windows.Forms.Label label3;
+        private System.Windows.Forms.TextBox textBoxXNumber;
+        private System.Windows.Forms.GroupBox groupBox2;
+        private System.Windows.Forms.Label label4;
+        private System.Windows.Forms.GroupBox groupBox3;
+        private System.Windows.Forms.TextBox textBoxXSpacing;
+        private System.Windows.Forms.TextBox textBoxYSpacing;
+        private System.Windows.Forms.Label label5;
+        private System.Windows.Forms.Label label6;
+        private System.Windows.Forms.Label label7;
+        private System.Windows.Forms.Label label8;
+        private System.Windows.Forms.TextBox textBoxXFirstLabel;
+        private System.Windows.Forms.ComboBox comboBoxXBubbleLocation;
+        private System.Windows.Forms.Button buttonCreate;
+        private System.Windows.Forms.Button buttonCancel;
+        private System.Windows.Forms.TextBox textBoxYFirstLabel;
+        private System.Windows.Forms.ComboBox comboBoxYBubbleLocation;
+        private System.Windows.Forms.Label label10;
+        private System.Windows.Forms.Label label9;
+        private System.Windows.Forms.Label labelUnitY;
+        private System.Windows.Forms.Label labelUnitX;
+        private System.Windows.Forms.Label labelYCoordUnit;
+        private System.Windows.Forms.Label labelXCoordUnit;
+    }
+}

SDK/Samples/GridCreation/CS/CreateOrthogonalGridsForm.cs

@@ -0,0 +1,160 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    ///  The dialog which provides the options of creating orthogonal grids
+    /// </summary>
+    public partial class CreateOrthogonalGridsForm : System.Windows.Forms.Form
+    {
+        // data class object
+        private CreateOrthogonalGridsData m_data;
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="data">Data class object</param>
+        public CreateOrthogonalGridsForm(CreateOrthogonalGridsData data)
+        {
+            m_data = data;
+
+            InitializeComponent();
+            // Set state of controls
+            InitializeControls();
+        }
+
+        /// <summary>
+        /// Set state of controls
+        /// </summary>
+        private void InitializeControls()
+        {
+            // Set length unit related labels
+            String unit = Properties.Resources.ResourceManager.GetString(m_data.Unit.TypeId);
+            labelUnitX.Text = unit;
+            labelUnitY.Text = unit;
+            labelXCoordUnit.Text = unit;
+            labelYCoordUnit.Text = unit;
+
+
+            // Set spacing values
+            textBoxXSpacing.Text = Unit.CovertFromAPI(m_data.Unit, 10).ToString();
+            textBoxYSpacing.Text = textBoxXSpacing.Text;
+
+            // Set bubble locations to end point
+            comboBoxXBubbleLocation.SelectedIndex = 1;
+            comboBoxYBubbleLocation.SelectedIndex = 1;
+        }
+
+        private void buttonCreate_Click(object sender, EventArgs e)
+        {
+            // Check if input are validated
+            if (ValidateValues())
+            {
+                // Transfer data back into data class
+                SetData();
+            }
+            else
+            {
+                this.DialogResult = DialogResult.None;
+            }
+        }
+
+        /// <summary>
+        /// Transfer data back into data class
+        /// </summary>
+        private void SetData()
+        {
+            m_data.XOrigin = Unit.CovertToAPI(Convert.ToDouble(textBoxXCoord.Text), m_data.Unit);
+            m_data.YOrigin = Unit.CovertToAPI(Convert.ToDouble(textBoxYCoord.Text), m_data.Unit);            
+            m_data.XNumber = Convert.ToUInt32(textBoxXNumber.Text);
+            m_data.YNumber = Convert.ToUInt32(textBoxYNumber.Text);
+
+            if (Convert.ToUInt32(textBoxXNumber.Text) != 0)
+            {
+                m_data.XSpacing = Unit.CovertToAPI(Convert.ToDouble(textBoxXSpacing.Text), m_data.Unit);
+                m_data.XBubbleLoc = (BubbleLocation)comboBoxXBubbleLocation.SelectedIndex;
+                m_data.XFirstLabel = textBoxXFirstLabel.Text;
+            }
+
+            if (Convert.ToUInt32(textBoxYNumber.Text) != 0)
+            {
+                m_data.YSpacing = Unit.CovertToAPI(Convert.ToDouble(textBoxYSpacing.Text), m_data.Unit);
+                m_data.YBubbleLoc = (BubbleLocation)comboBoxYBubbleLocation.SelectedIndex;
+                m_data.YFirstLabel = textBoxYFirstLabel.Text;
+            }  
+        }
+
+        /// <summary>
+        /// Check if input are validated
+        /// </summary>
+        /// <returns>Whether input is validated</returns>        
+        private bool ValidateValues()
+        {
+            if (!Validation.ValidateNumbers(textBoxXNumber, textBoxYNumber))
+            {
+                return false;
+            }
+
+            if (!Validation.ValidateCoord(textBoxXCoord) || !Validation.ValidateCoord(textBoxYCoord))
+            {
+                return false;
+            }
+
+            if (Convert.ToUInt32(textBoxXNumber.Text) != 0)
+            {
+                if (!Validation.ValidateLength(textBoxXSpacing, "Spacing", false) ||
+                    !Validation.ValidateLabel(textBoxXFirstLabel, m_data.LabelsList))
+                {
+                    return false;
+                }
+            }
+
+            if (Convert.ToUInt32(textBoxYNumber.Text) != 0)
+            {
+                if (!Validation.ValidateLength(textBoxYSpacing, "Spacing", false) ||
+                    !Validation.ValidateLabel(textBoxYFirstLabel, m_data.LabelsList))
+                {
+                    return false;
+                }
+            }
+           
+            if (Convert.ToUInt32(textBoxXNumber.Text) != 0 && Convert.ToUInt32(textBoxYNumber.Text) != 0)
+            {
+                if (!Validation.ValidateLabels(textBoxXFirstLabel, textBoxYFirstLabel))
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+    }
+}

SDK/Samples/GridCreation/CS/CreateOrthogonalGridsForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

SDK/Samples/GridCreation/CS/CreateRadialAndArcGridsData.cs

@@ -0,0 +1,558 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Collections;
+using System.Windows.Forms;
+
+using Autodesk.Revit;
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+using Application = Autodesk.Revit.ApplicationServices.Application;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// The dialog which provides the options of creating radial and arc grids
+    /// </summary>
+    public class CreateRadialAndArcGridsData : CreateGridsData
+    {
+        #region Fields
+        // X coordinate of origin
+        private double m_xOrigin;
+        // Y coordinate of origin
+        private double m_yOrigin;
+        // Start degree of arc grids and radial grids
+        private double m_startDegree;
+        // End degree of arc grids and radial grids
+        private double m_endDegree;
+        // Spacing between arc grids
+        private double m_arcSpacing;
+        // Number of arc grids
+        private uint m_arcNumber;
+        // Number of radial grids
+        private uint m_lineNumber;
+        // Radius of first arc grid
+        private double m_arcFirstRadius;
+        // Distance from origin to start point
+        private double m_LineFirstDistance;
+        // Bubble location of arc grids
+        private BubbleLocation m_arcFirstBubbleLoc;
+        // Bubble location of radial grids
+        private BubbleLocation m_lineFirstBubbleLoc;
+        // Label of first arc grid
+        private String m_arcFirstLabel;
+        // Label of first radial grid
+        private String m_lineFirstLabel;
+        #endregion
+
+        #region Properties
+        /// <summary>
+        /// X coordinate of origin
+        /// </summary>
+        public double XOrigin
+        {
+            get
+            {
+                return m_xOrigin;
+            }
+            set 
+            { 
+                m_xOrigin = value; 
+            }
+        }
+
+        /// <summary>
+        /// Y coordinate of origin
+        /// </summary>
+        public double YOrigin
+        {
+            get
+            {
+                return m_yOrigin;
+            }
+            set 
+            { 
+                m_yOrigin = value; 
+            }
+        }
+
+        /// <summary>
+        /// Start degree of arc grids and radial grids
+        /// </summary>
+        public double StartDegree
+        {
+            get
+            {
+                return m_startDegree;
+            }
+            set 
+            { 
+                m_startDegree = value; 
+            }
+        }
+
+        /// <summary>
+        /// End degree of arc grids and radial grids
+        /// </summary>
+        public double EndDegree
+        {
+            get
+            {
+                return m_endDegree;
+            }
+            set 
+            { 
+                m_endDegree = value; 
+            }
+        }
+
+        /// <summary>
+        /// Spacing between arc grids
+        /// </summary>
+        public double ArcSpacing
+        {
+            get
+            {
+                return m_arcSpacing;
+            }
+            set 
+            { 
+                m_arcSpacing = value; 
+            }
+        }
+
+        /// <summary>
+        /// Number of arc grids
+        /// </summary>
+        public uint ArcNumber
+        {
+            get
+            {
+                return m_arcNumber;
+            }
+            set 
+            { 
+                m_arcNumber = value; 
+            }
+        }
+
+        /// <summary>
+        /// Number of radial grids
+        /// </summary>
+        public uint LineNumber
+        {
+            get
+            {
+                return m_lineNumber;
+            }
+            set 
+            { 
+                m_lineNumber = value; 
+            }
+        }
+
+        /// <summary>
+        /// Radius of first arc grid
+        /// </summary>
+        public double ArcFirstRadius
+        {
+            get
+            {
+                return m_arcFirstRadius;
+            }
+            set 
+            { 
+                m_arcFirstRadius = value; 
+            }
+        }
+
+        /// <summary>
+        /// Distance from origin to start point
+        /// </summary>
+        public double LineFirstDistance
+        {
+            get
+            {
+                return m_LineFirstDistance;
+            }
+            set 
+            { 
+                m_LineFirstDistance = value; 
+            }
+        }
+
+        /// <summary>
+        /// Bubble location of arc grids
+        /// </summary>
+        public BubbleLocation ArcFirstBubbleLoc
+        {
+            get
+            {
+                return m_arcFirstBubbleLoc;
+            }
+            set 
+            { 
+                m_arcFirstBubbleLoc = value; 
+            }
+        }
+
+        /// <summary>
+        /// Bubble location of radial grids
+        /// </summary>
+        public BubbleLocation LineFirstBubbleLoc
+        {
+            get
+            {
+                return m_lineFirstBubbleLoc;
+            }
+            set 
+            { 
+                m_lineFirstBubbleLoc = value; 
+            }
+        }
+
+        /// <summary>
+        /// Label of first arc grid
+        /// </summary>
+        public String ArcFirstLabel
+        {
+            get
+            {
+                return m_arcFirstLabel;
+            }
+            set 
+            { 
+                m_arcFirstLabel = value; 
+            }
+        }
+
+        /// <summary>
+        /// Label of first radial grid
+        /// </summary>
+        public String LineFirstLabel
+        {
+            get
+            {
+                return m_lineFirstLabel;
+            }
+            set 
+            { 
+                m_lineFirstLabel = value; 
+            }
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="application">Application object</param>
+        /// <param name="unit">Current length display unit type</param>
+        /// <param name="labels">All existing labels in Revit's document</param>
+        public CreateRadialAndArcGridsData(UIApplication application, ForgeTypeId unit, ArrayList labels)
+            : base(application, labels, unit)
+        {
+        }
+
+        /// <summary>
+        /// Create grids
+        /// </summary>
+        public void CreateGrids()
+        {
+            if (CreateRadialGrids() != 0)
+            {
+                String failureReason = resManager.GetString("FailedToCreateRadialGrids") + "\r";
+                failureReason += resManager.GetString("AjustValues");
+
+                ShowMessage(failureReason, resManager.GetString("FailureCaptionCreateGrids"));
+            }
+
+            ArrayList failureReasons = new ArrayList();
+            if (CreateArcGrids(ref failureReasons) != 0)
+            {
+                String failureReason = resManager.GetString("FailedToCreateArcGrids") +
+                    resManager.GetString("Reasons") + "\r";
+                if (failureReasons.Count != 0)
+                {
+                    failureReason += "\r";
+                    foreach (String reason in failureReasons)
+                    {
+                        failureReason += reason + "\r";
+                    }                   
+                }
+                failureReason += "\r" + resManager.GetString("AjustValues");
+
+                ShowMessage(failureReason, resManager.GetString("FailureCaptionCreateGrids"));
+            }
+        }
+
+        /// <summary>
+        /// Create radial grids
+        /// </summary>
+        /// <returns>Number of grids failed to create</returns>
+        private int CreateRadialGrids()
+        {
+            int errorCount = 0;
+
+            // Curve array which stores all curves for batch creation
+            CurveArray curves = new CurveArray();
+
+            for (int i = 0; i < m_lineNumber; ++i)
+            {
+                try
+                {
+                    double angel;
+                    if (m_lineNumber == 1)
+                    {
+                        angel = (m_startDegree + m_endDegree) / 2;
+                    }
+                    else
+                    {
+                        // The number of space between radial grids will be m_lineNumber if arc is a circle
+                        if (m_endDegree - m_startDegree == 2 * Values.PI)
+                        {
+                            angel = m_startDegree + i * (m_endDegree - m_startDegree) / m_lineNumber;
+                        }
+                        // The number of space between radial grids will be m_lineNumber-1 if arc is not a circle
+                        else
+                        {
+                            angel = m_startDegree + i * (m_endDegree - m_startDegree) / (m_lineNumber - 1);
+                        }
+                    }                    
+
+                    Autodesk.Revit.DB.XYZ startPoint;
+                    Autodesk.Revit.DB.XYZ endPoint;
+                    double cos = Math.Cos(angel);
+                    double sin = Math.Sin(angel);
+
+                    if (m_arcNumber != 0)
+                    {
+                        // Grids will have an extension distance of m_ySpacing / 2
+                        startPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + m_LineFirstDistance * cos, m_yOrigin + m_LineFirstDistance * sin, 0);
+                        endPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + (m_arcFirstRadius + (m_arcNumber - 1) * m_arcSpacing + m_arcSpacing / 2) * cos,
+                            m_yOrigin + (m_arcFirstRadius + (m_arcNumber - 1) * m_arcSpacing + m_arcSpacing / 2) * sin, 0);
+                    }
+                    else
+                    {
+                        startPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + m_LineFirstDistance * cos, m_yOrigin + m_LineFirstDistance * sin, 0);
+                        endPoint = new Autodesk.Revit.DB.XYZ (m_xOrigin + (m_arcFirstRadius + 5) * cos, m_yOrigin + (m_arcFirstRadius + 5) * sin, 0);
+                    }
+
+                    Line line;
+                    // Create a line according to the bubble location
+                    if (m_lineFirstBubbleLoc == BubbleLocation.StartPoint)
+                    {
+                        line = NewLine(startPoint, endPoint);
+                    }
+                    else
+                    {
+                        line = NewLine(endPoint, startPoint);
+                    }
+
+                    if (i == 0)
+                    {
+                        // Create grid with line
+                        Grid grid = NewGrid(line);
+
+                        try
+                        {
+                            // Set label of first radial grid
+                            grid.Name = m_lineFirstLabel;
+                        }
+                        catch (System.ArgumentException)
+                        {
+                            ShowMessage(resManager.GetString("FailedToSetLabel") + m_lineFirstLabel + "!",
+                                        resManager.GetString("FailureCaptionSetLabel"));
+                        }
+                    }
+                    else
+                    {
+                        // Add the line to curve array
+                        AddCurveForBatchCreation(ref curves, line);
+                    }
+                }
+                catch (Exception)
+                {
+                    ++errorCount;
+                    continue;
+                }                
+            }
+
+            // Create grids with curves
+            CreateGrids(curves);
+
+            return errorCount;
+        }
+
+        /// <summary>
+        /// Create Arc Grids
+        /// </summary>
+        /// <param name="failureReasons">ArrayList contains failure reasons</param>
+        /// <returns>Number of grids failed to create</returns>
+        private int CreateArcGrids(ref ArrayList failureReasons)
+        {
+            int errorCount = 0;
+
+            // Curve array which stores all curves for batch creation
+            CurveArray curves = new CurveArray();
+
+            for (int i = 0; i < m_arcNumber; ++i)
+            {
+                try
+                {
+                    Autodesk.Revit.DB.XYZ origin = new Autodesk.Revit.DB.XYZ (m_xOrigin, m_yOrigin, 0);
+                    double radius = m_arcFirstRadius + i * m_arcSpacing;
+
+                    // In Revit UI user can select a circle to create a grid, but actually two grids 
+                    // (One from 0 to 180 degree and the other from 180 degree to 360) will be created. 
+                    // In RevitAPI using NewGrid method with a circle as its argument will raise an exception. 
+                    // Therefore in this sample we will create two arcs from the upper and lower parts of the 
+                    // circle, and then create two grids on the base of the two arcs to accord with UI.
+                    if (m_endDegree - m_startDegree == 2 * Values.PI) // Create circular grids
+                    {
+                        Arc upperArcToCreate;
+                        Arc lowerArcToCreate;
+                        upperArcToCreate = TransformArc(origin, radius, 0, Values.PI, m_arcFirstBubbleLoc);
+
+                        if (i == 0)
+                        {
+                            Grid gridUpper;
+                            gridUpper = NewGrid(upperArcToCreate);
+                            if (gridUpper != null)
+                            {
+                                try
+                                {
+                                    // Set label of first grid
+                                    gridUpper.Name = m_arcFirstLabel;
+                                }
+                                catch (System.ArgumentException)
+                                {
+                                    ShowMessage(resManager.GetString("FailedToSetLabel") + m_arcFirstLabel + "!",
+                                                resManager.GetString("FailureCaptionSetLabel"));
+                                }
+                            }
+                        }
+                        else
+                        {
+                            curves.Append(upperArcToCreate);
+                        }
+
+                        lowerArcToCreate = TransformArc(origin, radius, Values.PI, 2 * Values.PI, m_arcFirstBubbleLoc);
+                        curves.Append(lowerArcToCreate);
+                    }
+                    else // Create arc grids
+                    {
+                        // Each arc grid will has extension degree of 15 degree
+                        double extensionDegree = 15 * Values.DEGTORAD;
+                        Grid grid;
+                        Arc arcToCreate;
+
+                        if (m_lineNumber != 0)
+                        {
+                            // If the range of arc degree is too close to a circle, the arc grids will not have 
+                            // extension degrees.
+                            // Also the room for bubble should be considered, so a room size of 3 * extensionDegree
+                            // is reserved here
+                            if (m_endDegree - m_startDegree < 2 * Values.PI - 3 * extensionDegree)
+                            {
+                                double startDegreeWithExtension = m_startDegree - extensionDegree;
+                                double endDegreeWithExtension = m_endDegree + extensionDegree;
+                                
+                                arcToCreate = TransformArc(origin, radius, startDegreeWithExtension, endDegreeWithExtension, m_arcFirstBubbleLoc);
+                            }
+                            else
+                            {
+                                try
+                                {
+                                    arcToCreate = TransformArc(origin, radius, m_startDegree, m_endDegree, m_arcFirstBubbleLoc);
+                                }
+                                catch (System.ArgumentException)
+                                {
+                                    String failureReason = resManager.GetString("EndPointsTooClose");
+                                    if (!failureReasons.Contains(failureReason))
+                                    {
+                                        failureReasons.Add(failureReason);
+                                    }
+                                    errorCount++;
+                                    continue;
+                                }
+                            }
+                        }
+                        else
+                        {
+                            try
+                            {
+                                arcToCreate = TransformArc(origin, radius, m_startDegree, m_endDegree, m_arcFirstBubbleLoc);
+                            }
+                            catch (System.ArgumentException)
+                            {
+                                String failureReason = resManager.GetString("EndPointsTooClose");
+                                if (!failureReasons.Contains(failureReason))
+                                {
+                                    failureReasons.Add(failureReason);
+                                }
+                                errorCount++;
+                                continue;
+                            }
+                        }
+
+
+                        if (i == 0)
+                        {
+                            grid = NewGrid(arcToCreate);
+                            if (grid != null)
+                            {
+                                try
+                                {
+                                    grid.Name = m_arcFirstLabel;
+                                }
+                                catch (System.ArgumentException)
+                                {
+                                    ShowMessage(resManager.GetString("FailedToSetLabel") + m_arcFirstLabel + "!",
+                                                resManager.GetString("FailureCaptionSetLabel"));
+                                } 
+                            }                            
+                        }
+                        else
+                        {
+                            curves.Append(arcToCreate);
+                        }
+                    }
+                }
+                catch (Exception)
+                {
+                    ++errorCount;
+                    continue;
+                }
+            }
+
+            // Create grids with curves
+            CreateGrids(curves);
+
+            return errorCount;
+        }
+        #endregion
+    }
+}

SDK/Samples/GridCreation/CS/CreateRadialAndArcGridsForm.Designer.cs

@@ -0,0 +1,546 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// The dialog which provides the options of creating radial and arc grids
+    /// </summary>
+    partial class CreateRadialAndArcGridsForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.textBoxArcSpacing = new System.Windows.Forms.TextBox();
+            this.label6 = new System.Windows.Forms.Label();
+            this.groupBox3 = new System.Windows.Forms.GroupBox();
+            this.labelUnitFirstRadius = new System.Windows.Forms.Label();
+            this.labelUnitX = new System.Windows.Forms.Label();
+            this.textBoxArcFirstRadius = new System.Windows.Forms.TextBox();
+            this.comboBoxArcBubbleLocation = new System.Windows.Forms.ComboBox();
+            this.label10 = new System.Windows.Forms.Label();
+            this.textBoxArcFirstLabel = new System.Windows.Forms.TextBox();
+            this.textBoxArcNumber = new System.Windows.Forms.TextBox();
+            this.label9 = new System.Windows.Forms.Label();
+            this.label5 = new System.Windows.Forms.Label();
+            this.label3 = new System.Windows.Forms.Label();
+            this.label4 = new System.Windows.Forms.Label();
+            this.textBoxYCoord = new System.Windows.Forms.TextBox();
+            this.textBoxXCoord = new System.Windows.Forms.TextBox();
+            this.label2 = new System.Windows.Forms.Label();
+            this.label1 = new System.Windows.Forms.Label();
+            this.groupBox2 = new System.Windows.Forms.GroupBox();
+            this.labelUnitY = new System.Windows.Forms.Label();
+            this.textBoxLineFirstDistance = new System.Windows.Forms.TextBox();
+            this.comboBoxLineBubbleLocation = new System.Windows.Forms.ComboBox();
+            this.label11 = new System.Windows.Forms.Label();
+            this.textBoxLineNumber = new System.Windows.Forms.TextBox();
+            this.textBoxLineFirstLabel = new System.Windows.Forms.TextBox();
+            this.label13 = new System.Windows.Forms.Label();
+            this.label12 = new System.Windows.Forms.Label();
+            this.groupBox1 = new System.Windows.Forms.GroupBox();
+            this.labelYCoordUnit = new System.Windows.Forms.Label();
+            this.labelXCoordUnit = new System.Windows.Forms.Label();
+            this.buttonCancel = new System.Windows.Forms.Button();
+            this.buttonCreate = new System.Windows.Forms.Button();
+            this.groupBox4 = new System.Windows.Forms.GroupBox();
+            this.textBoxEndDegree = new System.Windows.Forms.TextBox();
+            this.textBoxStartDegree = new System.Windows.Forms.TextBox();
+            this.labelEndDegree = new System.Windows.Forms.Label();
+            this.labelStartDegree = new System.Windows.Forms.Label();
+            this.radioButtonCustomize = new System.Windows.Forms.RadioButton();
+            this.radioButton360 = new System.Windows.Forms.RadioButton();
+            this.groupBox3.SuspendLayout();
+            this.groupBox2.SuspendLayout();
+            this.groupBox1.SuspendLayout();
+            this.groupBox4.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // textBoxArcSpacing
+            // 
+            this.textBoxArcSpacing.Location = new System.Drawing.Point(132, 17);
+            this.textBoxArcSpacing.Name = "textBoxArcSpacing";
+            this.textBoxArcSpacing.Size = new System.Drawing.Size(108, 20);
+            this.textBoxArcSpacing.TabIndex = 0;
+            this.textBoxArcSpacing.Tag = "10.0";
+            this.textBoxArcSpacing.Text = 10.0.ToString("0.0");
+            // 
+            // label6
+            // 
+            this.label6.Location = new System.Drawing.Point(13, 20);
+            this.label6.Name = "label6";
+            this.label6.Size = new System.Drawing.Size(113, 18);
+            this.label6.TabIndex = 6;
+            this.label6.Text = "Spacing:";
+            // 
+            // groupBox3
+            // 
+            this.groupBox3.Controls.Add(this.labelUnitFirstRadius);
+            this.groupBox3.Controls.Add(this.labelUnitX);
+            this.groupBox3.Controls.Add(this.textBoxArcFirstRadius);
+            this.groupBox3.Controls.Add(this.comboBoxArcBubbleLocation);
+            this.groupBox3.Controls.Add(this.label10);
+            this.groupBox3.Controls.Add(this.textBoxArcFirstLabel);
+            this.groupBox3.Controls.Add(this.textBoxArcNumber);
+            this.groupBox3.Controls.Add(this.label9);
+            this.groupBox3.Controls.Add(this.textBoxArcSpacing);
+            this.groupBox3.Controls.Add(this.label5);
+            this.groupBox3.Controls.Add(this.label3);
+            this.groupBox3.Controls.Add(this.label6);
+            this.groupBox3.Location = new System.Drawing.Point(12, 175);
+            this.groupBox3.Name = "groupBox3";
+            this.groupBox3.Size = new System.Drawing.Size(544, 116);
+            this.groupBox3.TabIndex = 2;
+            this.groupBox3.TabStop = false;
+            this.groupBox3.Text = "Arc Grids";
+            // 
+            // labelUnitFirstRadius
+            // 
+            this.labelUnitFirstRadius.Location = new System.Drawing.Point(240, 52);
+            this.labelUnitFirstRadius.Name = "labelUnitFirstRadius";
+            this.labelUnitFirstRadius.Size = new System.Drawing.Size(23, 23);
+            this.labelUnitFirstRadius.TabIndex = 31;
+            // 
+            // labelUnitX
+            // 
+            this.labelUnitX.Location = new System.Drawing.Point(240, 20);
+            this.labelUnitX.Name = "labelUnitX";
+            this.labelUnitX.Size = new System.Drawing.Size(23, 23);
+            this.labelUnitX.TabIndex = 13;
+            // 
+            // textBoxArcFirstRadius
+            // 
+            this.textBoxArcFirstRadius.Location = new System.Drawing.Point(132, 50);
+            this.textBoxArcFirstRadius.Name = "textBoxArcFirstRadius";
+            this.textBoxArcFirstRadius.Size = new System.Drawing.Size(108, 20);
+            this.textBoxArcFirstRadius.TabIndex = 2;
+            this.textBoxArcFirstRadius.Text = 10.0.ToString("0.0");
+            // 
+            // comboBoxArcBubbleLocation
+            // 
+            this.comboBoxArcBubbleLocation.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.comboBoxArcBubbleLocation.FormattingEnabled = true;
+            this.comboBoxArcBubbleLocation.Items.AddRange(new object[] {
+            "At start point of arcs",
+            "At end point of arcs"});
+            this.comboBoxArcBubbleLocation.Location = new System.Drawing.Point(133, 83);
+            this.comboBoxArcBubbleLocation.Name = "comboBoxArcBubbleLocation";
+            this.comboBoxArcBubbleLocation.Size = new System.Drawing.Size(373, 21);
+            this.comboBoxArcBubbleLocation.TabIndex = 4;
+            // 
+            // label10
+            // 
+            this.label10.Location = new System.Drawing.Point(13, 52);
+            this.label10.Name = "label10";
+            this.label10.Size = new System.Drawing.Size(113, 18);
+            this.label10.TabIndex = 7;
+            this.label10.Text = "Radius of first grid:";
+            // 
+            // textBoxArcFirstLabel
+            // 
+            this.textBoxArcFirstLabel.Location = new System.Drawing.Point(398, 50);
+            this.textBoxArcFirstLabel.Name = "textBoxArcFirstLabel";
+            this.textBoxArcFirstLabel.Size = new System.Drawing.Size(108, 20);
+            this.textBoxArcFirstLabel.TabIndex = 3;
+            this.textBoxArcFirstLabel.Tag = "";
+            this.textBoxArcFirstLabel.Text = "1";
+            // 
+            // textBoxArcNumber
+            // 
+            this.textBoxArcNumber.Location = new System.Drawing.Point(398, 17);
+            this.textBoxArcNumber.Name = "textBoxArcNumber";
+            this.textBoxArcNumber.Size = new System.Drawing.Size(108, 20);
+            this.textBoxArcNumber.TabIndex = 1;
+            this.textBoxArcNumber.Text = "3";
+            // 
+            // label9
+            // 
+            this.label9.Location = new System.Drawing.Point(279, 52);
+            this.label9.Name = "label9";
+            this.label9.Size = new System.Drawing.Size(113, 18);
+            this.label9.TabIndex = 30;
+            this.label9.Text = "Label of first grid:";
+            // 
+            // label5
+            // 
+            this.label5.Location = new System.Drawing.Point(13, 85);
+            this.label5.Name = "label5";
+            this.label5.Size = new System.Drawing.Size(113, 18);
+            this.label5.TabIndex = 29;
+            this.label5.Text = "Bubble location:";
+            // 
+            // label3
+            // 
+            this.label3.Location = new System.Drawing.Point(279, 20);
+            this.label3.Name = "label3";
+            this.label3.Size = new System.Drawing.Size(113, 18);
+            this.label3.TabIndex = 6;
+            this.label3.Text = "Number:";
+            // 
+            // label4
+            // 
+            this.label4.Location = new System.Drawing.Point(279, 23);
+            this.label4.Name = "label4";
+            this.label4.Size = new System.Drawing.Size(113, 18);
+            this.label4.TabIndex = 6;
+            this.label4.Text = "Number:";
+            // 
+            // textBoxYCoord
+            // 
+            this.textBoxYCoord.Location = new System.Drawing.Point(398, 22);
+            this.textBoxYCoord.Name = "textBoxYCoord";
+            this.textBoxYCoord.Size = new System.Drawing.Size(108, 20);
+            this.textBoxYCoord.TabIndex = 1;
+            this.textBoxYCoord.Text = "0";
+            // 
+            // textBoxXCoord
+            // 
+            this.textBoxXCoord.Location = new System.Drawing.Point(132, 21);
+            this.textBoxXCoord.Name = "textBoxXCoord";
+            this.textBoxXCoord.Size = new System.Drawing.Size(108, 20);
+            this.textBoxXCoord.TabIndex = 0;
+            this.textBoxXCoord.Text = "0";
+            // 
+            // label2
+            // 
+            this.label2.Location = new System.Drawing.Point(279, 25);
+            this.label2.Name = "label2";
+            this.label2.Size = new System.Drawing.Size(113, 18);
+            this.label2.TabIndex = 0;
+            this.label2.Text = "Y coordinate:";
+            // 
+            // label1
+            // 
+            this.label1.Location = new System.Drawing.Point(13, 25);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(112, 18);
+            this.label1.TabIndex = 0;
+            this.label1.Text = "X coordinate:";
+            // 
+            // groupBox2
+            // 
+            this.groupBox2.Controls.Add(this.labelUnitY);
+            this.groupBox2.Controls.Add(this.textBoxLineFirstDistance);
+            this.groupBox2.Controls.Add(this.comboBoxLineBubbleLocation);
+            this.groupBox2.Controls.Add(this.label11);
+            this.groupBox2.Controls.Add(this.textBoxLineNumber);
+            this.groupBox2.Controls.Add(this.textBoxLineFirstLabel);
+            this.groupBox2.Controls.Add(this.label13);
+            this.groupBox2.Controls.Add(this.label4);
+            this.groupBox2.Controls.Add(this.label12);
+            this.groupBox2.Location = new System.Drawing.Point(13, 297);
+            this.groupBox2.Name = "groupBox2";
+            this.groupBox2.Size = new System.Drawing.Size(543, 119);
+            this.groupBox2.TabIndex = 3;
+            this.groupBox2.TabStop = false;
+            this.groupBox2.Text = "Radial Grids";
+            // 
+            // labelUnitY
+            // 
+            this.labelUnitY.Location = new System.Drawing.Point(508, 88);
+            this.labelUnitY.Name = "labelUnitY";
+            this.labelUnitY.Size = new System.Drawing.Size(23, 23);
+            this.labelUnitY.TabIndex = 13;
+            // 
+            // textBoxLineFirstDistance
+            // 
+            this.textBoxLineFirstDistance.Location = new System.Drawing.Point(236, 86);
+            this.textBoxLineFirstDistance.Name = "textBoxLineFirstDistance";
+            this.textBoxLineFirstDistance.Size = new System.Drawing.Size(270, 20);
+            this.textBoxLineFirstDistance.TabIndex = 3;
+            this.textBoxLineFirstDistance.Text = 8.0.ToString("0.0");
+            // 
+            // comboBoxLineBubbleLocation
+            // 
+            this.comboBoxLineBubbleLocation.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.comboBoxLineBubbleLocation.FormattingEnabled = true;
+            this.comboBoxLineBubbleLocation.Items.AddRange(new object[] {
+            "At start point of lines",
+            "At end point of lines"});
+            this.comboBoxLineBubbleLocation.Location = new System.Drawing.Point(131, 54);
+            this.comboBoxLineBubbleLocation.Name = "comboBoxLineBubbleLocation";
+            this.comboBoxLineBubbleLocation.Size = new System.Drawing.Size(374, 21);
+            this.comboBoxLineBubbleLocation.TabIndex = 2;
+            // 
+            // label11
+            // 
+            this.label11.Location = new System.Drawing.Point(6, 88);
+            this.label11.Name = "label11";
+            this.label11.Size = new System.Drawing.Size(224, 18);
+            this.label11.TabIndex = 7;
+            this.label11.Text = "Distance from origin to start point:";
+            // 
+            // textBoxLineNumber
+            // 
+            this.textBoxLineNumber.Location = new System.Drawing.Point(398, 23);
+            this.textBoxLineNumber.Name = "textBoxLineNumber";
+            this.textBoxLineNumber.Size = new System.Drawing.Size(108, 20);
+            this.textBoxLineNumber.TabIndex = 1;
+            this.textBoxLineNumber.Tag = "3";
+            this.textBoxLineNumber.Text = "3";
+            // 
+            // textBoxLineFirstLabel
+            // 
+            this.textBoxLineFirstLabel.Location = new System.Drawing.Point(131, 20);
+            this.textBoxLineFirstLabel.Name = "textBoxLineFirstLabel";
+            this.textBoxLineFirstLabel.Size = new System.Drawing.Size(108, 20);
+            this.textBoxLineFirstLabel.TabIndex = 0;
+            this.textBoxLineFirstLabel.Tag = "A";
+            this.textBoxLineFirstLabel.Text = "A";
+            // 
+            // label13
+            // 
+            this.label13.Location = new System.Drawing.Point(6, 23);
+            this.label13.Name = "label13";
+            this.label13.Size = new System.Drawing.Size(119, 18);
+            this.label13.TabIndex = 30;
+            this.label13.Text = "Label of first grid:";
+            // 
+            // label12
+            // 
+            this.label12.Location = new System.Drawing.Point(6, 57);
+            this.label12.Name = "label12";
+            this.label12.Size = new System.Drawing.Size(119, 18);
+            this.label12.TabIndex = 29;
+            this.label12.Text = "Bubble location:";
+            // 
+            // groupBox1
+            // 
+            this.groupBox1.Controls.Add(this.textBoxYCoord);
+            this.groupBox1.Controls.Add(this.labelYCoordUnit);
+            this.groupBox1.Controls.Add(this.labelXCoordUnit);
+            this.groupBox1.Controls.Add(this.textBoxXCoord);
+            this.groupBox1.Controls.Add(this.label2);
+            this.groupBox1.Controls.Add(this.label1);
+            this.groupBox1.Location = new System.Drawing.Point(13, 12);
+            this.groupBox1.Name = "groupBox1";
+            this.groupBox1.Size = new System.Drawing.Size(543, 55);
+            this.groupBox1.TabIndex = 0;
+            this.groupBox1.TabStop = false;
+            this.groupBox1.Text = "Center of Arc Grids";
+            // 
+            // labelYCoordUnit
+            // 
+            this.labelYCoordUnit.Location = new System.Drawing.Point(508, 22);
+            this.labelYCoordUnit.Name = "labelYCoordUnit";
+            this.labelYCoordUnit.Size = new System.Drawing.Size(23, 23);
+            this.labelYCoordUnit.TabIndex = 13;
+            // 
+            // labelXCoordUnit
+            // 
+            this.labelXCoordUnit.Location = new System.Drawing.Point(240, 24);
+            this.labelXCoordUnit.Name = "labelXCoordUnit";
+            this.labelXCoordUnit.Size = new System.Drawing.Size(23, 23);
+            this.labelXCoordUnit.TabIndex = 13;
+            // 
+            // buttonCancel
+            // 
+            this.buttonCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+            this.buttonCancel.Location = new System.Drawing.Point(463, 436);
+            this.buttonCancel.Name = "buttonCancel";
+            this.buttonCancel.Size = new System.Drawing.Size(94, 23);
+            this.buttonCancel.TabIndex = 5;
+            this.buttonCancel.Text = "&Cancel";
+            this.buttonCancel.UseVisualStyleBackColor = true;
+            // 
+            // buttonCreate
+            // 
+            this.buttonCreate.DialogResult = System.Windows.Forms.DialogResult.OK;
+            this.buttonCreate.Location = new System.Drawing.Point(356, 436);
+            this.buttonCreate.Name = "buttonCreate";
+            this.buttonCreate.Size = new System.Drawing.Size(94, 23);
+            this.buttonCreate.TabIndex = 4;
+            this.buttonCreate.Text = "Create &Grids";
+            this.buttonCreate.UseVisualStyleBackColor = true;
+            this.buttonCreate.Click += new System.EventHandler(this.buttonCreate_Click);
+            // 
+            // groupBox4
+            // 
+            this.groupBox4.Controls.Add(this.textBoxEndDegree);
+            this.groupBox4.Controls.Add(this.textBoxStartDegree);
+            this.groupBox4.Controls.Add(this.labelEndDegree);
+            this.groupBox4.Controls.Add(this.labelStartDegree);
+            this.groupBox4.Controls.Add(this.radioButtonCustomize);
+            this.groupBox4.Controls.Add(this.radioButton360);
+            this.groupBox4.Location = new System.Drawing.Point(13, 74);
+            this.groupBox4.Name = "groupBox4";
+            this.groupBox4.Size = new System.Drawing.Size(543, 95);
+            this.groupBox4.TabIndex = 1;
+            this.groupBox4.TabStop = false;
+            this.groupBox4.Text = "Span of Grids";
+            // 
+            // textBoxEndDegree
+            // 
+            this.textBoxEndDegree.Location = new System.Drawing.Point(397, 62);
+            this.textBoxEndDegree.Name = "textBoxEndDegree";
+            this.textBoxEndDegree.Size = new System.Drawing.Size(108, 20);
+            this.textBoxEndDegree.TabIndex = 3;
+            this.textBoxEndDegree.Text = "360";
+            // 
+            // textBoxStartDegree
+            // 
+            this.textBoxStartDegree.Location = new System.Drawing.Point(131, 62);
+            this.textBoxStartDegree.Name = "textBoxStartDegree";
+            this.textBoxStartDegree.Size = new System.Drawing.Size(108, 20);
+            this.textBoxStartDegree.TabIndex = 2;
+            this.textBoxStartDegree.Text = "0";
+            // 
+            // labelEndDegree
+            // 
+            this.labelEndDegree.Location = new System.Drawing.Point(279, 64);
+            this.labelEndDegree.Name = "labelEndDegree";
+            this.labelEndDegree.Size = new System.Drawing.Size(113, 18);
+            this.labelEndDegree.TabIndex = 2;
+            this.labelEndDegree.Text = "End degree:";
+            // 
+            // labelStartDegree
+            // 
+            this.labelStartDegree.Location = new System.Drawing.Point(24, 64);
+            this.labelStartDegree.Name = "labelStartDegree";
+            this.labelStartDegree.Size = new System.Drawing.Size(101, 18);
+            this.labelStartDegree.TabIndex = 2;
+            this.labelStartDegree.Text = "Start degree:";
+            // 
+            // radioButtonCustomize
+            // 
+            this.radioButtonCustomize.Location = new System.Drawing.Point(9, 41);
+            this.radioButtonCustomize.Name = "radioButtonCustomize";
+            this.radioButtonCustomize.Size = new System.Drawing.Size(104, 24);
+            this.radioButtonCustomize.TabIndex = 1;
+            this.radioButtonCustomize.Text = "Customize";
+            this.radioButtonCustomize.UseVisualStyleBackColor = true;
+            this.radioButtonCustomize.CheckedChanged += new System.EventHandler(this.radioButtonCustomize_CheckedChanged);
+            // 
+            // radioButton360
+            // 
+            this.radioButton360.AutoSize = true;
+            this.radioButton360.Checked = true;
+            this.radioButton360.Location = new System.Drawing.Point(9, 20);
+            this.radioButton360.Name = "radioButton360";
+            this.radioButton360.Size = new System.Drawing.Size(79, 17);
+            this.radioButton360.TabIndex = 0;
+            this.radioButton360.TabStop = true;
+            this.radioButton360.Text = "360 degree";
+            this.radioButton360.UseVisualStyleBackColor = true;
+            this.radioButton360.MouseClick += new System.Windows.Forms.MouseEventHandler(this.radioButton360_MouseClick);
+            // 
+            // CreateRadialAndArcGridsForm
+            // 
+            this.AcceptButton = this.buttonCreate;
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.CancelButton = this.buttonCancel;
+            this.ClientSize = new System.Drawing.Size(568, 466);
+            this.Controls.Add(this.groupBox4);
+            this.Controls.Add(this.buttonCancel);
+            this.Controls.Add(this.buttonCreate);
+            this.Controls.Add(this.groupBox3);
+            this.Controls.Add(this.groupBox2);
+            this.Controls.Add(this.groupBox1);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "CreateRadialAndArcGridsForm";
+            this.ShowIcon = false;
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Create Radial and Arc Grids";
+            this.groupBox3.ResumeLayout(false);
+            this.groupBox3.PerformLayout();
+            this.groupBox2.ResumeLayout(false);
+            this.groupBox2.PerformLayout();
+            this.groupBox1.ResumeLayout(false);
+            this.groupBox1.PerformLayout();
+            this.groupBox4.ResumeLayout(false);
+            this.groupBox4.PerformLayout();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.TextBox textBoxArcSpacing;
+        private System.Windows.Forms.Label label6;
+        private System.Windows.Forms.GroupBox groupBox3;
+        private System.Windows.Forms.Label label4;
+        private System.Windows.Forms.TextBox textBoxYCoord;
+        private System.Windows.Forms.TextBox textBoxXCoord;
+        private System.Windows.Forms.Label label2;
+        private System.Windows.Forms.Label label1;
+        private System.Windows.Forms.GroupBox groupBox2;
+        private System.Windows.Forms.TextBox textBoxLineNumber;
+        private System.Windows.Forms.GroupBox groupBox1;
+        private System.Windows.Forms.TextBox textBoxArcNumber;
+        private System.Windows.Forms.Button buttonCancel;
+        private System.Windows.Forms.Button buttonCreate;
+        private System.Windows.Forms.Label label3;
+        private System.Windows.Forms.GroupBox groupBox4;
+        private System.Windows.Forms.TextBox textBoxEndDegree;
+        private System.Windows.Forms.TextBox textBoxStartDegree;
+        private System.Windows.Forms.Label labelEndDegree;
+        private System.Windows.Forms.Label labelStartDegree;
+        private System.Windows.Forms.RadioButton radioButtonCustomize;
+        private System.Windows.Forms.RadioButton radioButton360;
+        private System.Windows.Forms.TextBox textBoxArcFirstRadius;
+        private System.Windows.Forms.Label label10;
+        private System.Windows.Forms.TextBox textBoxLineFirstDistance;
+        private System.Windows.Forms.Label label11;
+        private System.Windows.Forms.ComboBox comboBoxArcBubbleLocation;
+        private System.Windows.Forms.TextBox textBoxArcFirstLabel;
+        private System.Windows.Forms.Label label9;
+        private System.Windows.Forms.Label label5;
+        private System.Windows.Forms.ComboBox comboBoxLineBubbleLocation;
+        private System.Windows.Forms.TextBox textBoxLineFirstLabel;
+        private System.Windows.Forms.Label label13;
+        private System.Windows.Forms.Label label12;
+        private System.Windows.Forms.Label labelUnitX;
+        private System.Windows.Forms.Label labelUnitY;
+        private System.Windows.Forms.Label labelUnitFirstRadius;
+        private System.Windows.Forms.Label labelYCoordUnit;
+        private System.Windows.Forms.Label labelXCoordUnit;
+
+
+    }
+}

SDK/Samples/GridCreation/CS/CreateRadialAndArcGridsForm.cs

@@ -0,0 +1,200 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    public partial class CreateRadialAndArcGridsForm : System.Windows.Forms.Form
+    {
+        // data class object
+        private CreateRadialAndArcGridsData m_data;
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="data">Data class object</param>
+        public CreateRadialAndArcGridsForm(CreateRadialAndArcGridsData data)
+        {
+            m_data = data;
+
+            InitializeComponent();
+            // Set state of controls
+            InitializeControls();
+        }
+
+        /// <summary>
+        /// Set state of controls
+        /// </summary>
+        private void InitializeControls()
+        {
+            // Set length unit related labels
+            String unit = Properties.Resources.ResourceManager.GetString(m_data.Unit.TypeId);
+            labelUnitX.Text = unit;
+            labelUnitY.Text = unit;
+            labelUnitFirstRadius.Text = unit;
+            labelXCoordUnit.Text = unit;
+            labelYCoordUnit.Text = unit;
+
+            // Set length values
+            textBoxArcSpacing.Text = Unit.CovertFromAPI(m_data.Unit, 10).ToString();
+            textBoxArcFirstRadius.Text = textBoxArcSpacing.Text;
+            textBoxLineFirstDistance.Text = Unit.CovertFromAPI(m_data.Unit, 8).ToString();
+
+            radioButton360.Checked = true;
+            radioButtonCustomize.Checked = false;
+            labelStartDegree.Enabled = false;
+            textBoxStartDegree.Enabled = false;
+            labelEndDegree.Enabled = false;
+            textBoxEndDegree.Enabled = false;
+            comboBoxArcBubbleLocation.SelectedIndex = 1;
+            comboBoxLineBubbleLocation.SelectedIndex = 1;
+        }
+
+        private void radioButtonCustomize_CheckedChanged(object sender, EventArgs e)
+        {
+            bool IsCustomize = radioButtonCustomize.Checked;
+            labelStartDegree.Enabled = IsCustomize;
+            textBoxStartDegree.Enabled = IsCustomize;
+            labelEndDegree.Enabled = IsCustomize;
+            textBoxEndDegree.Enabled = IsCustomize;
+        }
+
+        private void radioButton360_MouseClick(object sender, MouseEventArgs e)
+        {
+            radioButtonCustomize.Checked = !radioButton360.Checked;
+        }
+
+        private void buttonCreate_Click(object sender, EventArgs e)
+        {
+            // Check if input are validated
+            if (ValidateValues())
+            {
+                // Transfer data back into data class
+                SetData();
+            }
+            else
+            {
+                this.DialogResult = DialogResult.None;
+            }
+        }
+
+        /// <summary>
+        /// Transfer data back into data class
+        /// </summary>
+        private void SetData()
+        {
+            m_data.XOrigin = Unit.CovertToAPI(Convert.ToDouble(textBoxXCoord.Text), m_data.Unit);
+            m_data.YOrigin = Unit.CovertToAPI(Convert.ToDouble(textBoxYCoord.Text), m_data.Unit);
+
+            if (radioButton360.Checked)
+            {
+                m_data.StartDegree = 0;
+                m_data.EndDegree = 2 * Values.PI;
+            }
+            else
+            {
+                m_data.StartDegree = Convert.ToDouble(textBoxStartDegree.Text) * Values.DEGTORAD;
+                m_data.EndDegree = Convert.ToDouble(textBoxEndDegree.Text) * Values.DEGTORAD;
+            }
+
+            m_data.ArcNumber = Convert.ToUInt32(textBoxArcNumber.Text);
+            m_data.LineNumber = Convert.ToUInt32(textBoxLineNumber.Text);
+
+
+            if (Convert.ToUInt32(textBoxArcNumber.Text) != 0)
+            {
+                m_data.ArcSpacing = Unit.CovertToAPI(Convert.ToDouble(textBoxArcSpacing.Text), m_data.Unit);
+                m_data.ArcFirstRadius = Unit.CovertToAPI(Convert.ToDouble(textBoxArcFirstRadius.Text), m_data.Unit);
+                m_data.ArcFirstBubbleLoc = (BubbleLocation)comboBoxArcBubbleLocation.SelectedIndex;
+                m_data.ArcFirstLabel = textBoxArcFirstLabel.Text;
+            }
+
+            if (Convert.ToUInt32(textBoxLineNumber.Text) != 0)
+            {
+                m_data.LineFirstDistance = Unit.CovertToAPI(Convert.ToDouble(textBoxLineFirstDistance.Text), m_data.Unit);
+                m_data.LineFirstBubbleLoc = (BubbleLocation)comboBoxLineBubbleLocation.SelectedIndex;
+                m_data.LineFirstLabel = textBoxLineFirstLabel.Text;
+            }
+        }
+
+        /// <summary>
+        /// Check if input are validated
+        /// </summary>
+        /// <returns>Whether input is validated</returns>
+        private bool ValidateValues()
+        {
+            if (!Validation.ValidateNumbers(textBoxArcNumber, textBoxLineNumber))
+            {
+                return false;
+            }
+
+            if (!Validation.ValidateCoord(textBoxXCoord) || !Validation.ValidateCoord(textBoxYCoord))
+            {
+                return false;
+            }
+
+            if (Convert.ToUInt32(textBoxArcNumber.Text) != 0)
+            {
+                if (!Validation.ValidateLength(textBoxArcSpacing, "Spacing", false) ||
+                    !Validation.ValidateLength(textBoxArcFirstRadius, "Radius", false) ||
+                    !Validation.ValidateLabel(textBoxArcFirstLabel, m_data.LabelsList))
+                {
+                    return false;
+                }
+            }
+
+            if (Convert.ToUInt32(textBoxLineNumber.Text) != 0)
+            {
+                if (!Validation.ValidateLength(textBoxLineFirstDistance, "Distance", true) ||
+                !Validation.ValidateLabel(textBoxLineFirstLabel, m_data.LabelsList))
+                {
+                    return false;
+                }
+            }
+
+            if (Convert.ToUInt32(textBoxArcNumber.Text) != 0 && Convert.ToUInt32(textBoxLineNumber.Text) != 0)
+            {
+                if (!Validation.ValidateLabels(textBoxArcFirstLabel, textBoxLineFirstLabel))
+                {
+                    return false;
+                }
+            }
+
+            if (radioButtonCustomize.Checked)
+            {
+                if (!Validation.ValidateDegrees(textBoxStartDegree, textBoxEndDegree))
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+    }
+}

SDK/Samples/GridCreation/CS/CreateRadialAndArcGridsForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

SDK/Samples/GridCreation/CS/CreateWithSelectedCurvesForm.Designer.cs

@@ -0,0 +1,183 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    partial class CreateWithSelectedCurvesForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.buttonCancel = new System.Windows.Forms.Button();
+            this.buttonOK = new System.Windows.Forms.Button();
+            this.textBoxFirstLabel = new System.Windows.Forms.TextBox();
+            this.comboBoxBubbleLocation = new System.Windows.Forms.ComboBox();
+            this.labelBubbleLocation = new System.Windows.Forms.Label();
+            this.labelFirstLabel = new System.Windows.Forms.Label();
+            this.groupBoxGridSettings = new System.Windows.Forms.GroupBox();
+            this.checkBoxDeleteElements = new System.Windows.Forms.CheckBox();
+            this.groupBoxGridSettings.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // buttonCancel
+            // 
+            this.buttonCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+            this.buttonCancel.Location = new System.Drawing.Point(232, 144);
+            this.buttonCancel.Name = "buttonCancel";
+            this.buttonCancel.Size = new System.Drawing.Size(90, 23);
+            this.buttonCancel.TabIndex = 1;
+            this.buttonCancel.Text = "&Cancel";
+            this.buttonCancel.UseVisualStyleBackColor = true;
+            // 
+            // buttonOK
+            // 
+            this.buttonOK.DialogResult = System.Windows.Forms.DialogResult.OK;
+            this.buttonOK.Location = new System.Drawing.Point(126, 144);
+            this.buttonOK.Name = "buttonOK";
+            this.buttonOK.Size = new System.Drawing.Size(90, 23);
+            this.buttonOK.TabIndex = 0;
+            this.buttonOK.Text = "Create &Grids";
+            this.buttonOK.UseVisualStyleBackColor = true;
+            this.buttonOK.Click += new System.EventHandler(this.buttonOK_Click);
+            // 
+            // textBoxFirstLabel
+            // 
+            this.textBoxFirstLabel.Location = new System.Drawing.Point(124, 53);
+            this.textBoxFirstLabel.Name = "textBoxFirstLabel";
+            this.textBoxFirstLabel.Size = new System.Drawing.Size(171, 20);
+            this.textBoxFirstLabel.TabIndex = 1;
+            this.textBoxFirstLabel.Tag = "";
+            this.textBoxFirstLabel.Text = "1";
+            // 
+            // comboBoxBubbleLocation
+            // 
+            this.comboBoxBubbleLocation.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.comboBoxBubbleLocation.FormattingEnabled = true;
+            this.comboBoxBubbleLocation.Items.AddRange(new object[] {
+            "At start point of lines/arcs",
+            "At end point of  lines/arcs"});
+            this.comboBoxBubbleLocation.Location = new System.Drawing.Point(124, 19);
+            this.comboBoxBubbleLocation.Name = "comboBoxBubbleLocation";
+            this.comboBoxBubbleLocation.Size = new System.Drawing.Size(171, 21);
+            this.comboBoxBubbleLocation.TabIndex = 0;
+            // 
+            // labelBubbleLocation
+            // 
+            this.labelBubbleLocation.Location = new System.Drawing.Point(6, 21);
+            this.labelBubbleLocation.Name = "labelBubbleLocation";
+            this.labelBubbleLocation.Size = new System.Drawing.Size(112, 19);
+            this.labelBubbleLocation.TabIndex = 16;
+            this.labelBubbleLocation.Text = "Bubble location:";
+            // 
+            // labelFirstLabel
+            // 
+            this.labelFirstLabel.Location = new System.Drawing.Point(6, 56);
+            this.labelFirstLabel.Name = "labelFirstLabel";
+            this.labelFirstLabel.Size = new System.Drawing.Size(112, 19);
+            this.labelFirstLabel.TabIndex = 15;
+            this.labelFirstLabel.Text = "Label of first grid:";
+            // 
+            // groupBoxGridSettings
+            // 
+            this.groupBoxGridSettings.Controls.Add(this.checkBoxDeleteElements);
+            this.groupBoxGridSettings.Controls.Add(this.labelBubbleLocation);
+            this.groupBoxGridSettings.Controls.Add(this.textBoxFirstLabel);
+            this.groupBoxGridSettings.Controls.Add(this.labelFirstLabel);
+            this.groupBoxGridSettings.Controls.Add(this.comboBoxBubbleLocation);
+            this.groupBoxGridSettings.Location = new System.Drawing.Point(12, 12);
+            this.groupBoxGridSettings.Name = "groupBoxGridSettings";
+            this.groupBoxGridSettings.Size = new System.Drawing.Size(310, 113);
+            this.groupBoxGridSettings.TabIndex = 18;
+            this.groupBoxGridSettings.TabStop = false;
+            this.groupBoxGridSettings.Text = "Settings";
+            // 
+            // checkBoxDeleteElements
+            // 
+            this.checkBoxDeleteElements.AutoSize = true;
+            this.checkBoxDeleteElements.Checked = true;
+            this.checkBoxDeleteElements.CheckState = System.Windows.Forms.CheckState.Checked;
+            this.checkBoxDeleteElements.Location = new System.Drawing.Point(9, 87);
+            this.checkBoxDeleteElements.Name = "checkBoxDeleteElements";
+            this.checkBoxDeleteElements.Size = new System.Drawing.Size(232, 17);
+            this.checkBoxDeleteElements.TabIndex = 2;
+            this.checkBoxDeleteElements.Text = "Delete the selected lines/arcs after creation";
+            this.checkBoxDeleteElements.UseVisualStyleBackColor = true;
+            // 
+            // CreateWithSelectedCurvesForm
+            // 
+            this.AcceptButton = this.buttonOK;
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.CancelButton = this.buttonCancel;
+            this.ClientSize = new System.Drawing.Size(334, 177);
+            this.Controls.Add(this.groupBoxGridSettings);
+            this.Controls.Add(this.buttonCancel);
+            this.Controls.Add(this.buttonOK);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "CreateWithSelectedCurvesForm";
+            this.ShowIcon = false;
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Create Grids with Lines/Arcs";
+            this.groupBoxGridSettings.ResumeLayout(false);
+            this.groupBoxGridSettings.PerformLayout();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Button buttonCancel;
+        private System.Windows.Forms.Button buttonOK;
+        private System.Windows.Forms.TextBox textBoxFirstLabel;
+        private System.Windows.Forms.ComboBox comboBoxBubbleLocation;
+        private System.Windows.Forms.Label labelBubbleLocation;
+        private System.Windows.Forms.Label labelFirstLabel;
+        private System.Windows.Forms.GroupBox groupBoxGridSettings;
+        private System.Windows.Forms.CheckBox checkBoxDeleteElements;
+    }
+}

SDK/Samples/GridCreation/CS/CreateWithSelectedCurvesForm.cs

@@ -0,0 +1,95 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// The dialog which provides the options of creating grids with selected lines/arcs
+    /// </summary>
+    public partial class CreateWithSelectedCurvesForm : System.Windows.Forms.Form
+    {
+        // data class object
+        private CreateWithSelectedCurvesData m_data;
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="data">Data class object</param>
+        public CreateWithSelectedCurvesForm(CreateWithSelectedCurvesData data)
+        {
+            m_data = data;
+
+            InitializeComponent();
+            // Set state of controls
+            InitializeControls(); 
+        }
+
+        /// <summary>
+        /// Set state of controls
+        /// </summary>
+        private void InitializeControls()
+        {
+            comboBoxBubbleLocation.SelectedIndex = 1;
+        }
+
+        private void buttonOK_Click(object sender, EventArgs e)
+        {
+            // Check if input are validated
+            if (ValidateValues())
+            {
+                // Transfer data back into data class
+                SetData();
+            }
+            else
+            {
+                this.DialogResult = DialogResult.None;
+            }
+        }
+
+        /// <summary>
+        /// Check if input are validated
+        /// </summary>
+        /// <returns>Whether input is validated</returns>        
+        private bool ValidateValues()
+        {
+            return Validation.ValidateLabel(textBoxFirstLabel, m_data.LabelsList);
+        }
+
+        /// <summary>
+        /// Transfer data back into data class
+        /// </summary>
+        private void SetData()
+        {
+            m_data.BubbleLocation = (BubbleLocation)comboBoxBubbleLocation.SelectedIndex;
+            m_data.FirstLabel = textBoxFirstLabel.Text;
+            m_data.DeleteSelectedElements = checkBoxDeleteElements.Checked;
+        }
+    }
+}

SDK/Samples/GridCreation/CS/CreateWithSelectedCurvesForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

SDK/Samples/GridCreation/CS/CreateWithSeletedCurvesData.cs

@@ -0,0 +1,259 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Collections;
+using System.Windows.Forms;
+
+using Autodesk.Revit;
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+using Application = Autodesk.Revit.ApplicationServices.Application;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+   /// <summary>
+   /// The dialog which provides the options of creating grids with selected lines/arcs
+   /// </summary>
+   public class CreateWithSelectedCurvesData : CreateGridsData
+   {
+      #region Fields
+      // Selected curves in current document
+      private CurveArray m_selectedCurves;
+      // Whether to delete selected lines/arc after creation
+      private bool m_deleteSelectedElements;
+      // Label of first grid
+      private String m_firstLabel;
+      // Bubble location of grids
+      private BubbleLocation m_bubbleLocation;
+      #endregion
+
+      #region Properties
+      /// <summary>
+      /// Whether to delete selected lines/arc after creation
+      /// </summary>
+      public bool DeleteSelectedElements
+      {
+         get
+         {
+            return m_deleteSelectedElements;
+         }
+         set
+         {
+            m_deleteSelectedElements = value;
+         }
+      }
+
+      /// <summary>
+      /// Bubble location of grids
+      /// </summary>
+      public BubbleLocation BubbleLocation
+      {
+         get
+         {
+            return m_bubbleLocation;
+         }
+         set
+         {
+            m_bubbleLocation = value;
+         }
+      }
+
+      /// <summary>
+      /// Label of first grid
+      /// </summary>
+      public String FirstLabel
+      {
+         get
+         {
+            return m_firstLabel;
+         }
+         set
+         {
+            m_firstLabel = value;
+         }
+      }
+      #endregion
+
+      #region Methods
+      /// <summary>
+      /// Constructor
+      /// </summary>
+      /// <param name="application">Revit application</param>
+      /// <param name="selectedCurves">Array contains geometry curves of selected lines or arcs </param>
+      /// <param name="labels">List contains all existing labels in Revit document</param>
+      public CreateWithSelectedCurvesData(UIApplication application, CurveArray selectedCurves, ArrayList labels)
+         : base(application, labels)
+      {
+         m_selectedCurves = selectedCurves;
+      }
+
+      /// <summary>
+      /// Create grids
+      /// </summary>
+      public void CreateGrids()
+      {
+         int errorCount = 0;
+
+         CurveArray curves = new CurveArray();
+
+         int i = 0;
+         foreach (Curve curve in m_selectedCurves)
+         {
+            try
+            {
+               Line line = curve as Line;
+               if (line != null) // Selected curve is a line
+               {
+                  Line lineToCreate;
+                  lineToCreate = TransformLine(line, m_bubbleLocation);
+                  if (i == 0)
+                  {
+                     Grid grid;
+                     // Create the first grid
+                     grid = CreateLinearGrid(lineToCreate);
+
+                     try
+                     {
+                        // Set label of first grid
+                        grid.Name = m_firstLabel;
+                     }
+                     catch (System.ArgumentException)
+                     {
+                        ShowMessage(resManager.GetString("FailedToSetLabel") + m_firstLabel + "!",
+                                    resManager.GetString("FailureCaptionSetLabel"));
+                     }
+                  }
+                  else
+                  {
+                     AddCurveForBatchCreation(ref curves, lineToCreate);
+                  }
+               }
+               else // Selected curve is an arc
+               {
+                  Arc arc = curve as Arc;
+                  if (arc != null)
+                  {
+                     if (arc.IsBound) // Part of a circle
+                     {
+                        Arc arcToCreate;
+                        arcToCreate = TransformArc(arc, m_bubbleLocation);
+
+                        if (i == 0)
+                        {
+                           Grid grid;
+                           // Create arc grid
+                           grid = NewGrid(arcToCreate);
+
+                           try
+                           {
+                              // Set label of first grid
+                              grid.Name = m_firstLabel;
+                           }
+                           catch (System.ArgumentException)
+                           {
+                              ShowMessage(resManager.GetString("FailedToSetLabel") + m_firstLabel + "!",
+                                          resManager.GetString("FailureCaptionSetLabel"));
+                           }
+                        }
+                        else
+                        {
+                           AddCurveForBatchCreation(ref curves, arcToCreate);
+                        }
+                     }
+                     else // Arc is a circle
+                     {
+                        // In Revit UI user can select a circle to create a grid, but actually two grids 
+                        // (One from 0 to 180 degree and the other from 180 degree to 360) will be created. 
+                        // In RevitAPI using NewGrid method with a circle as its argument will raise an exception. 
+                        // Therefore in this sample we will create two arcs from the upper and lower parts of the 
+                        // circle, and then create two grids on the base of the two arcs to accord with UI.
+                        Arc upperArc = null;
+                        Arc lowerArc = null;
+
+                        TransformCircle(arc, ref upperArc, ref lowerArc, m_bubbleLocation);
+                        // Create grids
+                        if (i == 0)
+                        {
+                           Grid gridUpper;
+                           // Create arc grid
+                           gridUpper = NewGrid(upperArc);
+                           try
+                           {
+                              // Set label of first grid
+                              gridUpper.Name = m_firstLabel;
+                           }
+                           catch (System.ArgumentException)
+                           {
+                              ShowMessage(resManager.GetString("FailedToSetLabel") + m_firstLabel + "!",
+                                          resManager.GetString("FailureCaptionSetLabel"));
+                           }
+                           AddCurveForBatchCreation(ref curves, lowerArc);
+                        }
+                        else
+                        {
+                           AddCurveForBatchCreation(ref curves, upperArc);
+                           AddCurveForBatchCreation(ref curves, lowerArc);
+                        }
+                     }
+                  }
+               }
+            }
+            catch (Exception)
+            {
+               ++errorCount;
+               continue;
+            }
+
+            ++i;
+         }
+
+         // Create grids with curves
+         CreateGrids(curves);
+
+         if (m_deleteSelectedElements)
+         {
+            try
+            {
+               foreach (Element e in Command.GetSelectedModelLinesAndArcs(m_revitDoc))
+               {
+                   m_revitDoc.Delete(e.Id);
+               }
+            }
+            catch (Exception)
+            {
+               ShowMessage(resManager.GetString("FailedToDeletedLinesOrArcs"),
+                           resManager.GetString("FailureCaptionDeletedLinesOrArcs"));
+            }
+         }
+
+         if (errorCount != 0)
+         {
+            ShowMessage(resManager.GetString("FailedToCreateGrids"),
+                        resManager.GetString("FailureCaptionCreateGrids"));
+         }
+      }
+      #endregion
+   }
+}

SDK/Samples/GridCreation/CS/EnumsAndValues.cs

@@ -0,0 +1,72 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// An enumerate type listing the ways to create grids.
+    /// </summary>
+    public enum CreateMode
+    {
+        /// <summary>
+        /// Create grids with selected lines/arcs
+        /// </summary>
+        Select,
+        /// <summary>
+        /// Create orthogonal grids
+        /// </summary>
+        Orthogonal,
+        /// <summary>
+        /// Create radial and arc grids
+        /// </summary>
+        RadialAndArc
+    }
+
+    /// <summary>
+    /// An enumerate type listing bubble locations of grids.
+    /// </summary>
+    public enum BubbleLocation
+    {
+        /// <summary>
+        /// Place bubble at the start point
+        /// </summary>
+        StartPoint,
+        /// <summary>
+        /// Place bubble at the end point
+        /// </summary>
+        EndPoint
+    }
+
+    /// <summary>
+    /// Class contains common const values
+    /// </summary>
+    static class Values
+    {
+        public const double PI = 3.1415926535897900;
+        // ratio from degree to radian
+        public const double DEGTORAD = PI / 180;
+    }
+}

SDK/Samples/GridCreation/CS/GridCreation.addin

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RevitAddIns>
+  <AddIn Type="Command">
+    <Assembly>GridCreation.dll</Assembly>
+    <ClientId>910cd1fa-2c3d-4eaf-9784-3286a625d924</ClientId>
+    <FullClassName>Revit.SDK.Samples.GridCreation.CS.Command</FullClassName>
+    <Text>Grid Creation</Text>
+    <Description>Show how to create grids.</Description>
+    <VisibilityMode>AlwaysVisible</VisibilityMode>
+    <VendorId>ADSK</VendorId>
+    <VendorDescription>Autodesk, www.autodesk.com</VendorDescription>
+  </AddIn>
+</RevitAddIns>

SDK/Samples/GridCreation/CS/GridCreation.csproj

@@ -0,0 +1,158 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>9.0.30729</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{9CBA7F2F-0B89-415D-B46E-F68057ACB04F}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Revit.SDK.Samples.GridCreation.CS</RootNamespace>
+    <AssemblyName>GridCreation</AssemblyName>
+    <StartupObject>
+    </StartupObject>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
+    <TargetFrameworkProfile />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
+    <DocumentationFile>bin\Debug\GridCreation.XML</DocumentationFile>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x64\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DocumentationFile>bin\Debug\GridCreation.XML</DocumentationFile>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x64</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
+    <OutputPath>bin\x64\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x64</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup>
+    <RunPostBuildEvent>OnOutputUpdated</RunPostBuildEvent>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Deployment" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core">
+      <RequiredTargetFramework>3.5</RequiredTargetFramework>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Command.cs" />
+    <Compile Include="CreateGridsData.cs" />
+    <Compile Include="CreateOrthogonalGridsData.cs" />
+    <Compile Include="CreateRadialAndArcGridsData.cs" />
+    <Compile Include="CreateWithSelectedCurvesForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="CreateWithSelectedCurvesForm.Designer.cs">
+      <DependentUpon>CreateWithSelectedCurvesForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="CreateWithSeletedCurvesData.cs" />
+    <Compile Include="EnumsAndValues.cs" />
+    <Compile Include="GridCreationOptionData.cs" />
+    <Compile Include="GridCreationOptionForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="GridCreationOptionForm.Designer.cs">
+      <DependentUpon>GridCreationOptionForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="CreateOrthogonalGridsForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="CreateOrthogonalGridsForm.Designer.cs">
+      <DependentUpon>CreateOrthogonalGridsForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <EmbeddedResource Include="CreateWithSelectedCurvesForm.resx">
+      <SubType>Designer</SubType>
+      <DependentUpon>CreateWithSelectedCurvesForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="GridCreationOptionForm.resx">
+      <SubType>Designer</SubType>
+      <DependentUpon>GridCreationOptionForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="CreateOrthogonalGridsForm.resx">
+      <SubType>Designer</SubType>
+      <DependentUpon>CreateOrthogonalGridsForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+    <EmbeddedResource Include="CreateRadialAndArcGridsForm.resx">
+      <SubType>Designer</SubType>
+      <DependentUpon>CreateRadialAndArcGridsForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+      <DesignTime>True</DesignTime>
+    </Compile>
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+    <Compile Include="CreateRadialAndArcGridsForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="CreateRadialAndArcGridsForm.Designer.cs">
+      <DependentUpon>CreateRadialAndArcGridsForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Unit.cs" />
+    <Compile Include="Validation.cs" />
+  </ItemGroup>
+  <Import Project="$(SolutionDir)VSProps\SDKSamples.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+  <PropertyGroup>
+    <PostBuildEvent>set FILEFORSAMPLEREG="$(SolutionDir)..\..\..\..\Regression\API\SDKSamples\UpdateSampleDllForRegression.pl"
+if exist %25FILEFORSAMPLEREG%25 perl %25FILEFORSAMPLEREG%25 $(ProjectExt) "$(ProjectPath)" "$(TargetPath)" "$(SolutionDir)"</PostBuildEvent>
+  </PropertyGroup>
+  <PropertyGroup>
+    <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
+  </PropertyGroup>
+</Project>

SDK/Samples/GridCreation/CS/GridCreationOptionData.cs

@@ -0,0 +1,83 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Autodesk.Revit;
+using Autodesk.Revit.DB;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// Data class which stores the information of the way to create grids
+    /// </summary>
+    public class GridCreationOptionData
+    {
+        #region Fields
+        // The way to create grids
+        private CreateMode m_createGridsMode;
+        // If lines/arcs have been selected
+        private bool m_hasSelectedLinesOrArcs;
+        #endregion
+
+        #region Properties
+        /// <summary>
+        /// Creating mode
+        /// </summary>
+        public CreateMode CreateGridsMode
+        {
+            get
+            {
+                return m_createGridsMode;
+            }
+            set 
+            { 
+                m_createGridsMode = value; 
+            }
+        }
+
+        /// <summary>
+        /// State whether lines/arcs have been selected
+        /// </summary>
+        public bool HasSelectedLinesOrArcs
+        {
+            get
+            {
+                return m_hasSelectedLinesOrArcs;
+            }
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="hasSelectedLinesOrArcs">Whether lines or arcs have been selected</param>
+        public GridCreationOptionData(bool hasSelectedLinesOrArcs)
+        {
+            m_hasSelectedLinesOrArcs = hasSelectedLinesOrArcs;
+        }
+        #endregion
+    }
+}

SDK/Samples/GridCreation/CS/GridCreationOptionForm.Designer.cs

@@ -0,0 +1,160 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    partial class GridCreationOptionForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.radioButtonSelect = new System.Windows.Forms.RadioButton();
+            this.radioButtonRadialAndCircularGrids = new System.Windows.Forms.RadioButton();
+            this.buttonCancel = new System.Windows.Forms.Button();
+            this.buttonOK = new System.Windows.Forms.Button();
+            this.groupBoxCreateOptions = new System.Windows.Forms.GroupBox();
+            this.radioButtonOrthogonalGrids = new System.Windows.Forms.RadioButton();
+            this.groupBoxCreateOptions.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // radioButtonSelect
+            // 
+            this.radioButtonSelect.AutoSize = true;
+            this.radioButtonSelect.Checked = true;
+            this.radioButtonSelect.Location = new System.Drawing.Point(6, 19);
+            this.radioButtonSelect.Name = "radioButtonSelect";
+            this.radioButtonSelect.Size = new System.Drawing.Size(205, 17);
+            this.radioButtonSelect.TabIndex = 0;
+            this.radioButtonSelect.TabStop = true;
+            this.radioButtonSelect.Text = "Create grids with selected lines or arcs";
+            this.radioButtonSelect.UseVisualStyleBackColor = true;
+            // 
+            // radioButtonRadialAndCircularGrids
+            // 
+            this.radioButtonRadialAndCircularGrids.AutoSize = true;
+            this.radioButtonRadialAndCircularGrids.Location = new System.Drawing.Point(6, 69);
+            this.radioButtonRadialAndCircularGrids.Name = "radioButtonRadialAndCircularGrids";
+            this.radioButtonRadialAndCircularGrids.Size = new System.Drawing.Size(199, 17);
+            this.radioButtonRadialAndCircularGrids.TabIndex = 2;
+            this.radioButtonRadialAndCircularGrids.Text = "Create a batch of radial and arc grids";
+            this.radioButtonRadialAndCircularGrids.UseVisualStyleBackColor = true;
+            // 
+            // buttonCancel
+            // 
+            this.buttonCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+            this.buttonCancel.Location = new System.Drawing.Point(159, 129);
+            this.buttonCancel.Name = "buttonCancel";
+            this.buttonCancel.Size = new System.Drawing.Size(90, 23);
+            this.buttonCancel.TabIndex = 1;
+            this.buttonCancel.Text = "&Cancel";
+            this.buttonCancel.UseVisualStyleBackColor = true;
+            // 
+            // buttonOK
+            // 
+            this.buttonOK.DialogResult = System.Windows.Forms.DialogResult.OK;
+            this.buttonOK.Location = new System.Drawing.Point(58, 129);
+            this.buttonOK.Name = "buttonOK";
+            this.buttonOK.Size = new System.Drawing.Size(90, 23);
+            this.buttonOK.TabIndex = 0;
+            this.buttonOK.Text = "&OK";
+            this.buttonOK.UseVisualStyleBackColor = true;
+            this.buttonOK.Click += new System.EventHandler(this.buttonOK_Click);
+            // 
+            // groupBoxCreateOptions
+            // 
+            this.groupBoxCreateOptions.Controls.Add(this.radioButtonSelect);
+            this.groupBoxCreateOptions.Controls.Add(this.radioButtonOrthogonalGrids);
+            this.groupBoxCreateOptions.Controls.Add(this.radioButtonRadialAndCircularGrids);
+            this.groupBoxCreateOptions.Location = new System.Drawing.Point(12, 12);
+            this.groupBoxCreateOptions.Name = "groupBoxCreateOptions";
+            this.groupBoxCreateOptions.Size = new System.Drawing.Size(237, 96);
+            this.groupBoxCreateOptions.TabIndex = 13;
+            this.groupBoxCreateOptions.TabStop = false;
+            this.groupBoxCreateOptions.Text = "Choose the way to create grids";
+            // 
+            // radioButtonOrthogonalGrids
+            // 
+            this.radioButtonOrthogonalGrids.AutoSize = true;
+            this.radioButtonOrthogonalGrids.Location = new System.Drawing.Point(6, 44);
+            this.radioButtonOrthogonalGrids.Name = "radioButtonOrthogonalGrids";
+            this.radioButtonOrthogonalGrids.Size = new System.Drawing.Size(185, 17);
+            this.radioButtonOrthogonalGrids.TabIndex = 1;
+            this.radioButtonOrthogonalGrids.Text = "Create a batch of orthogonal grids";
+            this.radioButtonOrthogonalGrids.UseVisualStyleBackColor = true;
+            // 
+            // GridCreationOptionForm
+            // 
+            this.AcceptButton = this.buttonOK;
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.CancelButton = this.buttonCancel;
+            this.ClientSize = new System.Drawing.Size(265, 164);
+            this.Controls.Add(this.groupBoxCreateOptions);
+            this.Controls.Add(this.buttonCancel);
+            this.Controls.Add(this.buttonOK);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "GridCreationOptionForm";
+            this.ShowIcon = false;
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Grid Creation";
+            this.groupBoxCreateOptions.ResumeLayout(false);
+            this.groupBoxCreateOptions.PerformLayout();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.RadioButton radioButtonSelect;
+        private System.Windows.Forms.RadioButton radioButtonRadialAndCircularGrids;
+        private System.Windows.Forms.Button buttonCancel;
+        private System.Windows.Forms.Button buttonOK;
+        private System.Windows.Forms.GroupBox groupBoxCreateOptions;
+        private System.Windows.Forms.RadioButton radioButtonOrthogonalGrids;
+    }
+}

SDK/Samples/GridCreation/CS/GridCreationOptionForm.cs

@@ -0,0 +1,81 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// The dialog which lets user choose the way to create grids
+    /// </summary>
+    public partial class GridCreationOptionForm : System.Windows.Forms.Form
+    {
+        // data class object
+        private GridCreationOptionData m_gridCreationOption;
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="opt">Data class object</param>
+        public GridCreationOptionForm(GridCreationOptionData opt)
+        {
+            m_gridCreationOption = opt;
+
+            InitializeComponent();
+            // Set state of controls
+            InitializeControls();            
+        }
+
+        /// <summary>
+        /// Set state of controls
+        /// </summary>
+        private void InitializeControls()
+        {
+            if (!m_gridCreationOption.HasSelectedLinesOrArcs)
+            {
+                radioButtonSelect.Enabled = false;
+                radioButtonOrthogonalGrids.Checked = true;
+            }
+        }
+
+        private void buttonOK_Click(object sender, EventArgs e)
+        {
+            // Transfer data back into data class
+            SetData();
+        }
+
+        /// <summary>
+        /// Transfer data back into data class
+        /// </summary>
+        private void SetData()
+        {
+            m_gridCreationOption.CreateGridsMode = radioButtonSelect.Checked ? CreateMode.Select :
+                (radioButtonOrthogonalGrids.Checked ? CreateMode.Orthogonal : CreateMode.RadialAndArc);
+        }
+    }
+}

SDK/Samples/GridCreation/CS/GridCreationOptionForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

SDK/Samples/GridCreation/CS/Properties/AssemblyInfo.cs

@@ -0,0 +1,55 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("CreateGrid")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("CreateGrid")]
+[assembly: AssemblyCopyright("Copyright © Autodesk, Inc. 2009")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("b4010800-54f5-4989-b8ac-685ef25506f5")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

SDK/Samples/GridCreation/CS/Properties/Resources.Designer.cs

@@ -0,0 +1,468 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Revit.SDK.Samples.GridCreation.CS.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Revit.SDK.Samples.GridCreation.CS.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Please adjust the values and try again!.
+        /// </summary>
+        internal static string AjustValues {
+            get {
+                return ResourceManager.GetString("AjustValues", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Coordinate can not be null!.
+        /// </summary>
+        internal static string CoordinateCannotBeNull {
+            get {
+                return ResourceManager.GetString("CoordinateCannotBeNull", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Coordinate is not in a correct format!.
+        /// </summary>
+        internal static string CoordinateFormatWrong {
+            get {
+                return ResourceManager.GetString("CoordinateFormatWrong", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Degree can not be negative!.
+        /// </summary>
+        internal static string DegreeCannotBeNegative {
+            get {
+                return ResourceManager.GetString("DegreeCannotBeNegative", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Degree can not be null!.
+        /// </summary>
+        internal static string DegreeCannotBeNull {
+            get {
+                return ResourceManager.GetString("DegreeCannotBeNull", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Degree is not in a correct format!.
+        /// </summary>
+        internal static string DegreeFormatWrong {
+            get {
+                return ResourceManager.GetString("DegreeFormatWrong", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Start degree and end degree can not be so close!.
+        /// </summary>
+        internal static string DegreesAreTooClose {
+            get {
+                return ResourceManager.GetString("DegreesAreTooClose", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Degree should be within the range of 0 - 360!.
+        /// </summary>
+        internal static string DegreeWithin0To360 {
+            get {
+                return ResourceManager.GetString("DegreeWithin0To360", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Distance can not be negative!.
+        /// </summary>
+        internal static string DistanceCannotBeNegative {
+            get {
+                return ResourceManager.GetString("DistanceCannotBeNegative", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Distance can not be null!.
+        /// </summary>
+        internal static string DistanceCannotBeNull {
+            get {
+                return ResourceManager.GetString("DistanceCannotBeNull", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Distance is not in a correct format!.
+        /// </summary>
+        internal static string DistanceFormatWrong {
+            get {
+                return ResourceManager.GetString("DistanceFormatWrong", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to cm.
+        /// </summary>
+        internal static string DUT_CENTIMETERS {
+            get {
+                return ResourceManager.GetString("DUT_CENTIMETERS", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to &apos;.
+        /// </summary>
+        internal static string DUT_DECIMAL_FEET {
+            get {
+                return ResourceManager.GetString("DUT_DECIMAL_FEET", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to &quot;.
+        /// </summary>
+        internal static string DUT_DECIMAL_INCHES {
+            get {
+                return ResourceManager.GetString("DUT_DECIMAL_INCHES", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to &apos;.
+        /// </summary>
+        internal static string DUT_FEET_FRACTIONAL_INCHES {
+            get {
+                return ResourceManager.GetString("DUT_FEET_FRACTIONAL_INCHES", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to &quot;.
+        /// </summary>
+        internal static string DUT_FRACTIONAL_INCHES {
+            get {
+                return ResourceManager.GetString("DUT_FRACTIONAL_INCHES", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to m.
+        /// </summary>
+        internal static string DUT_METERS {
+            get {
+                return ResourceManager.GetString("DUT_METERS", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to m.
+        /// </summary>
+        internal static string DUT_METERS_CENTIMETERS {
+            get {
+                return ResourceManager.GetString("DUT_METERS_CENTIMETERS", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to mm.
+        /// </summary>
+        internal static string DUT_MILLIMETERS {
+            get {
+                return ResourceManager.GetString("DUT_MILLIMETERS", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to - Start point and end point of arc grids are too close.
+        /// </summary>
+        internal static string EndPointsTooClose {
+            get {
+                return ResourceManager.GetString("EndPointsTooClose", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to create one or more arc grids..
+        /// </summary>
+        internal static string FailedToCreateArcGrids {
+            get {
+                return ResourceManager.GetString("FailedToCreateArcGrids", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to create one or more grids. .
+        /// </summary>
+        internal static string FailedToCreateGrids {
+            get {
+                return ResourceManager.GetString("FailedToCreateGrids", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to create one or more radial grids. .
+        /// </summary>
+        internal static string FailedToCreateRadialGrids {
+            get {
+                return ResourceManager.GetString("FailedToCreateRadialGrids", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to delete some of the selected lines or arcs!.
+        /// </summary>
+        internal static string FailedToDeletedLinesOrArcs {
+            get {
+                return ResourceManager.GetString("FailedToDeletedLinesOrArcs", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to set label of grid to : .
+        /// </summary>
+        internal static string FailedToSetLabel {
+            get {
+                return ResourceManager.GetString("FailedToSetLabel", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to Create Grids.
+        /// </summary>
+        internal static string FailureCaptionCreateGrids {
+            get {
+                return ResourceManager.GetString("FailureCaptionCreateGrids", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to Delete Lines/Arcs.
+        /// </summary>
+        internal static string FailureCaptionDeletedLinesOrArcs {
+            get {
+                return ResourceManager.GetString("FailureCaptionDeletedLinesOrArcs", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Invalid Value.
+        /// </summary>
+        internal static string FailureCaptionInvalidValue {
+            get {
+                return ResourceManager.GetString("FailureCaptionInvalidValue", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Failed to Set Label.
+        /// </summary>
+        internal static string FailureCaptionSetLabel {
+            get {
+                return ResourceManager.GetString("FailureCaptionSetLabel", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Label can not be null!.
+        /// </summary>
+        internal static string LabelCannotBeNull {
+            get {
+                return ResourceManager.GetString("LabelCannotBeNull", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to A same label has already existed!.
+        /// </summary>
+        internal static string LabelExisted {
+            get {
+                return ResourceManager.GetString("LabelExisted", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to The two labels can&apos;t be same!.
+        /// </summary>
+        internal static string LabelsCannotBeSame {
+            get {
+                return ResourceManager.GetString("LabelsCannotBeSame", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Number should be an integer between 0 and 200!.
+        /// </summary>
+        internal static string NumberBetween0And200 {
+            get {
+                return ResourceManager.GetString("NumberBetween0And200", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Number can not be null!.
+        /// </summary>
+        internal static string NumberCannotBeNull {
+            get {
+                return ResourceManager.GetString("NumberCannotBeNull", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Number is not in a correct format!.
+        /// </summary>
+        internal static string NumberFormatWrong {
+            get {
+                return ResourceManager.GetString("NumberFormatWrong", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to The two numbers can not be both zero!.
+        /// </summary>
+        internal static string NumbersCannotBeBothZero {
+            get {
+                return ResourceManager.GetString("NumbersCannotBeBothZero", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Radius can not be negative or zero!.
+        /// </summary>
+        internal static string RadiusCannotBeNegativeOrZero {
+            get {
+                return ResourceManager.GetString("RadiusCannotBeNegativeOrZero", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Radius can not be null!.
+        /// </summary>
+        internal static string RadiusCannotBeNull {
+            get {
+                return ResourceManager.GetString("RadiusCannotBeNull", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Radius is not in a correct format!.
+        /// </summary>
+        internal static string RadiusFormatWrong {
+            get {
+                return ResourceManager.GetString("RadiusFormatWrong", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to  That may be caused by one or more of following reasons:.
+        /// </summary>
+        internal static string Reasons {
+            get {
+                return ResourceManager.GetString("Reasons", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Spacing can not be negative or zero!.
+        /// </summary>
+        internal static string SpacingCannotBeNegativeOrZero {
+            get {
+                return ResourceManager.GetString("SpacingCannotBeNegativeOrZero", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Spacing can not be null!.
+        /// </summary>
+        internal static string SpacingCannotBeNull {
+            get {
+                return ResourceManager.GetString("SpacingCannotBeNull", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Spacing is not in a correct format!.
+        /// </summary>
+        internal static string SpacingFormatWrong {
+            get {
+                return ResourceManager.GetString("SpacingFormatWrong", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to - Spacings between grids are too small.
+        /// </summary>
+        internal static string SpacingsTooSmall {
+            get {
+                return ResourceManager.GetString("SpacingsTooSmall", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Start degree should be less than end degree!.
+        /// </summary>
+        internal static string StartDegreeShouldBeLessThanEndDegree {
+            get {
+                return ResourceManager.GetString("StartDegreeShouldBeLessThanEndDegree", resourceCulture);
+            }
+        }
+    }
+}

SDK/Samples/GridCreation/CS/Properties/Resources.resx

@@ -0,0 +1,255 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="AjustValues" xml:space="preserve">
+    <value>Please adjust the values and try again!</value>
+  </data>
+  <data name="CoordinateCannotBeNull" xml:space="preserve">
+    <value>Coordinate can not be null!</value>
+  </data>
+  <data name="CoordinateFormatWrong" xml:space="preserve">
+    <value>Coordinate is not in a correct format!</value>
+  </data>
+  <data name="DegreeCannotBeNegative" xml:space="preserve">
+    <value>Degree can not be negative!</value>
+  </data>
+  <data name="DegreeCannotBeNull" xml:space="preserve">
+    <value>Degree can not be null!</value>
+  </data>
+  <data name="DegreeFormatWrong" xml:space="preserve">
+    <value>Degree is not in a correct format!</value>
+  </data>
+  <data name="DegreesAreTooClose" xml:space="preserve">
+    <value>Start degree and end degree can not be so close!</value>
+  </data>
+  <data name="DegreeWithin0To360" xml:space="preserve">
+    <value>Degree should be within the range of 0 - 360!</value>
+  </data>
+  <data name="DistanceCannotBeNegative" xml:space="preserve">
+    <value>Distance can not be negative!</value>
+  </data>
+  <data name="DistanceCannotBeNull" xml:space="preserve">
+    <value>Distance can not be null!</value>
+  </data>
+  <data name="DistanceFormatWrong" xml:space="preserve">
+    <value>Distance is not in a correct format!</value>
+  </data>
+  <data name="DUT_CENTIMETERS" xml:space="preserve">
+    <value>cm</value>
+  </data>
+  <data name="DUT_DECIMAL_FEET" xml:space="preserve">
+    <value>'</value>
+  </data>
+  <data name="DUT_DECIMAL_INCHES" xml:space="preserve">
+    <value>"</value>
+  </data>
+  <data name="DUT_FEET_FRACTIONAL_INCHES" xml:space="preserve">
+    <value>'</value>
+  </data>
+  <data name="DUT_FRACTIONAL_INCHES" xml:space="preserve">
+    <value>"</value>
+  </data>
+  <data name="DUT_METERS" xml:space="preserve">
+    <value>m</value>
+  </data>
+  <data name="DUT_METERS_CENTIMETERS" xml:space="preserve">
+    <value>m</value>
+  </data>
+  <data name="DUT_MILLIMETERS" xml:space="preserve">
+    <value>mm</value>
+  </data>
+  <data name="EndPointsTooClose" xml:space="preserve">
+    <value>- Start point and end point of arc grids are too close</value>
+  </data>
+  <data name="FailedToCreateArcGrids" xml:space="preserve">
+    <value>Failed to create one or more arc grids.</value>
+  </data>
+  <data name="FailedToCreateGrids" xml:space="preserve">
+    <value>Failed to create one or more grids. </value>
+  </data>
+  <data name="FailedToCreateRadialGrids" xml:space="preserve">
+    <value>Failed to create one or more radial grids. </value>
+  </data>
+  <data name="FailedToDeletedLinesOrArcs" xml:space="preserve">
+    <value>Failed to delete some of the selected lines or arcs!</value>
+  </data>
+  <data name="FailedToSetLabel" xml:space="preserve">
+    <value>Failed to set label of grid to : </value>
+  </data>
+  <data name="FailureCaptionCreateGrids" xml:space="preserve">
+    <value>Failed to Create Grids</value>
+  </data>
+  <data name="FailureCaptionDeletedLinesOrArcs" xml:space="preserve">
+    <value>Failed to Delete Lines/Arcs</value>
+  </data>
+  <data name="FailureCaptionInvalidValue" xml:space="preserve">
+    <value>Invalid Value</value>
+  </data>
+  <data name="FailureCaptionSetLabel" xml:space="preserve">
+    <value>Failed to Set Label</value>
+  </data>
+  <data name="LabelCannotBeNull" xml:space="preserve">
+    <value>Label can not be null!</value>
+  </data>
+  <data name="LabelExisted" xml:space="preserve">
+    <value>A same label has already existed!</value>
+  </data>
+  <data name="LabelsCannotBeSame" xml:space="preserve">
+    <value>The two labels can't be same!</value>
+  </data>
+  <data name="NumberBetween0And200" xml:space="preserve">
+    <value>Number should be an integer between 0 and 200!</value>
+  </data>
+  <data name="NumberCannotBeNull" xml:space="preserve">
+    <value>Number can not be null!</value>
+  </data>
+  <data name="NumberFormatWrong" xml:space="preserve">
+    <value>Number is not in a correct format!</value>
+  </data>
+  <data name="NumbersCannotBeBothZero" xml:space="preserve">
+    <value>The two numbers can not be both zero!</value>
+  </data>
+  <data name="RadiusCannotBeNegativeOrZero" xml:space="preserve">
+    <value>Radius can not be negative or zero!</value>
+  </data>
+  <data name="RadiusCannotBeNull" xml:space="preserve">
+    <value>Radius can not be null!</value>
+  </data>
+  <data name="RadiusFormatWrong" xml:space="preserve">
+    <value>Radius is not in a correct format!</value>
+  </data>
+  <data name="Reasons" xml:space="preserve">
+    <value> That may be caused by one or more of following reasons:</value>
+  </data>
+  <data name="SpacingCannotBeNegativeOrZero" xml:space="preserve">
+    <value>Spacing can not be negative or zero!</value>
+  </data>
+  <data name="SpacingCannotBeNull" xml:space="preserve">
+    <value>Spacing can not be null!</value>
+  </data>
+  <data name="SpacingFormatWrong" xml:space="preserve">
+    <value>Spacing is not in a correct format!</value>
+  </data>
+  <data name="SpacingsTooSmall" xml:space="preserve">
+    <value>- Spacings between grids are too small</value>
+  </data>
+  <data name="StartDegreeShouldBeLessThanEndDegree" xml:space="preserve">
+    <value>Start degree should be less than end degree!</value>
+  </data>
+</root>

SDK/Samples/GridCreation/CS/Properties/Settings.Designer.cs

@@ -0,0 +1,26 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Revit.SDK.Samples.GridCreation.CS.Properties {
+    
+    
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "14.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
+        
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+        
+        public static Settings Default {
+            get {
+                return defaultInstance;
+            }
+        }
+    }
+}

SDK/Samples/GridCreation/CS/Properties/Settings.settings

@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>

SDK/Samples/GridCreation/CS/ReadMe_GridCreation.rtf

@@ -0,0 +1,301 @@
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+{\f2\fbidi \fmodern\fcharset0\fprq1{\*\panose 02070309020205020404}Courier New;}{\f13\fbidi \fswiss\fcharset128\fprq2{\*\panose 02010600030101010101}SimSun{\*\falt \'91\'76\'91\'cc};}
+{\f34\fbidi \froman\fcharset0\fprq2{\*\panose 02040503050406030204}Cambria Math;}{\f39\fbidi \fswiss\fcharset0\fprq2{\*\panose 020b0604030504040204}Verdana;}
+{\f40\fbidi \fnil\fcharset134\fprq1{\*\panose 00000000000000000000}Fixedsys{\*\falt Arial Unicode MS};}{\f171\fbidi \fswiss\fcharset128\fprq2{\*\panose 02010600030101010101}@SimSun;}
+{\f350\fbidi \fnil\fcharset134\fprq1{\*\panose 00000000000000000000}@Fixedsys;}{\flomajor\f31500\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}
+{\fdbmajor\f31501\fbidi \fswiss\fcharset128\fprq2{\*\panose 02010600030101010101}SimSun{\*\falt \'91\'76\'91\'cc};}{\fhimajor\f31502\fbidi \froman\fcharset0\fprq2{\*\panose 02040503050406030204}Cambria;}
+{\fbimajor\f31503\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\flominor\f31504\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}
+{\fdbminor\f31505\fbidi \fswiss\fcharset128\fprq2{\*\panose 02010600030101010101}SimSun{\*\falt \'91\'76\'91\'cc};}{\fhiminor\f31506\fbidi \fswiss\fcharset0\fprq2{\*\panose 020f0502020204030204}Calibri;}
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+{\f354\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;}{\f355\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;}{\f356\fbidi \froman\fcharset177\fprq2 Times New Roman (Hebrew);}{\f357\fbidi \froman\fcharset178\fprq2 Times New Roman (Arabic);}
+{\f358\fbidi \froman\fcharset186\fprq2 Times New Roman Baltic;}{\f359\fbidi \froman\fcharset163\fprq2 Times New Roman (Vietnamese);}{\f361\fbidi \fswiss\fcharset238\fprq2 Arial CE;}{\f362\fbidi \fswiss\fcharset204\fprq2 Arial Cyr;}
+{\f364\fbidi \fswiss\fcharset161\fprq2 Arial Greek;}{\f365\fbidi \fswiss\fcharset162\fprq2 Arial Tur;}{\f366\fbidi \fswiss\fcharset177\fprq2 Arial (Hebrew);}{\f367\fbidi \fswiss\fcharset178\fprq2 Arial (Arabic);}
+{\f368\fbidi \fswiss\fcharset186\fprq2 Arial Baltic;}{\f369\fbidi \fswiss\fcharset163\fprq2 Arial (Vietnamese);}{\f371\fbidi \fmodern\fcharset238\fprq1 Courier New CE;}{\f372\fbidi \fmodern\fcharset204\fprq1 Courier New Cyr;}
+{\f374\fbidi \fmodern\fcharset161\fprq1 Courier New Greek;}{\f375\fbidi \fmodern\fcharset162\fprq1 Courier New Tur;}{\f376\fbidi \fmodern\fcharset177\fprq1 Courier New (Hebrew);}{\f377\fbidi \fmodern\fcharset178\fprq1 Courier New (Arabic);}
+{\f378\fbidi \fmodern\fcharset186\fprq1 Courier New Baltic;}{\f379\fbidi \fmodern\fcharset163\fprq1 Courier New (Vietnamese);}{\f483\fbidi \fswiss\fcharset0\fprq2 SimSun Western{\*\falt \'91\'76\'91\'cc};}
+{\f481\fbidi \fswiss\fcharset238\fprq2 SimSun CE{\*\falt \'91\'76\'91\'cc};}{\f482\fbidi \fswiss\fcharset204\fprq2 SimSun Cyr{\*\falt \'91\'76\'91\'cc};}{\f484\fbidi \fswiss\fcharset161\fprq2 SimSun Greek{\*\falt \'91\'76\'91\'cc};}
+{\f485\fbidi \fswiss\fcharset162\fprq2 SimSun Tur{\*\falt \'91\'76\'91\'cc};}{\f487\fbidi \fswiss\fcharset178\fprq2 SimSun (Arabic){\*\falt \'91\'76\'91\'cc};}{\f488\fbidi \fswiss\fcharset186\fprq2 SimSun Baltic{\*\falt \'91\'76\'91\'cc};}
+{\f489\fbidi \fswiss\fcharset163\fprq2 SimSun (Vietnamese){\*\falt \'91\'76\'91\'cc};}{\f691\fbidi \froman\fcharset238\fprq2 Cambria Math CE;}{\f692\fbidi \froman\fcharset204\fprq2 Cambria Math Cyr;}
+{\f694\fbidi \froman\fcharset161\fprq2 Cambria Math Greek;}{\f695\fbidi \froman\fcharset162\fprq2 Cambria Math Tur;}{\f698\fbidi \froman\fcharset186\fprq2 Cambria Math Baltic;}{\f741\fbidi \fswiss\fcharset238\fprq2 Verdana CE;}
+{\f742\fbidi \fswiss\fcharset204\fprq2 Verdana Cyr;}{\f744\fbidi \fswiss\fcharset161\fprq2 Verdana Greek;}{\f745\fbidi \fswiss\fcharset162\fprq2 Verdana Tur;}{\f748\fbidi \fswiss\fcharset186\fprq2 Verdana Baltic;}
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+{\flomajor\f31511\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;}{\flomajor\f31512\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;}{\flomajor\f31513\fbidi \froman\fcharset177\fprq2 Times New Roman (Hebrew);}
+{\flomajor\f31514\fbidi \froman\fcharset178\fprq2 Times New Roman (Arabic);}{\flomajor\f31515\fbidi \froman\fcharset186\fprq2 Times New Roman Baltic;}{\flomajor\f31516\fbidi \froman\fcharset163\fprq2 Times New Roman (Vietnamese);}
+{\fdbmajor\f31520\fbidi \fswiss\fcharset0\fprq2 SimSun Western{\*\falt \'91\'76\'91\'cc};}{\fdbmajor\f31518\fbidi \fswiss\fcharset238\fprq2 SimSun CE{\*\falt \'91\'76\'91\'cc};}
+{\fdbmajor\f31519\fbidi \fswiss\fcharset204\fprq2 SimSun Cyr{\*\falt \'91\'76\'91\'cc};}{\fdbmajor\f31521\fbidi \fswiss\fcharset161\fprq2 SimSun Greek{\*\falt \'91\'76\'91\'cc};}
+{\fdbmajor\f31522\fbidi \fswiss\fcharset162\fprq2 SimSun Tur{\*\falt \'91\'76\'91\'cc};}{\fdbmajor\f31524\fbidi \fswiss\fcharset178\fprq2 SimSun (Arabic){\*\falt \'91\'76\'91\'cc};}
+{\fdbmajor\f31525\fbidi \fswiss\fcharset186\fprq2 SimSun Baltic{\*\falt \'91\'76\'91\'cc};}{\fdbmajor\f31526\fbidi \fswiss\fcharset163\fprq2 SimSun (Vietnamese){\*\falt \'91\'76\'91\'cc};}{\fhimajor\f31528\fbidi \froman\fcharset238\fprq2 Cambria CE;}
+{\fhimajor\f31529\fbidi \froman\fcharset204\fprq2 Cambria Cyr;}{\fhimajor\f31531\fbidi \froman\fcharset161\fprq2 Cambria Greek;}{\fhimajor\f31532\fbidi \froman\fcharset162\fprq2 Cambria Tur;}
+{\fhimajor\f31535\fbidi \froman\fcharset186\fprq2 Cambria Baltic;}{\fbimajor\f31538\fbidi \froman\fcharset238\fprq2 Times New Roman CE;}{\fbimajor\f31539\fbidi \froman\fcharset204\fprq2 Times New Roman Cyr;}
+{\fbimajor\f31541\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;}{\fbimajor\f31542\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;}{\fbimajor\f31543\fbidi \froman\fcharset177\fprq2 Times New Roman (Hebrew);}
+{\fbimajor\f31544\fbidi \froman\fcharset178\fprq2 Times New Roman (Arabic);}{\fbimajor\f31545\fbidi \froman\fcharset186\fprq2 Times New Roman Baltic;}{\fbimajor\f31546\fbidi \froman\fcharset163\fprq2 Times New Roman (Vietnamese);}
+{\flominor\f31548\fbidi \froman\fcharset238\fprq2 Times New Roman CE;}{\flominor\f31549\fbidi \froman\fcharset204\fprq2 Times New Roman Cyr;}{\flominor\f31551\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;}
+{\flominor\f31552\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;}{\flominor\f31553\fbidi \froman\fcharset177\fprq2 Times New Roman (Hebrew);}{\flominor\f31554\fbidi \froman\fcharset178\fprq2 Times New Roman (Arabic);}
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+{\pntxtb (}{\pntxta )}}\pard\plain \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 \rtlch\fcs1 \af31507\afs22\alang1025 \ltrch\fcs0 \fs22\lang1033\langfe2052\loch\af31506\hich\af31506\dbch\af31505\cgrid\langnp1033\langfenp2052 {
+\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Application:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  GridCreation\line }{\rtlch\fcs1 \ab\af1\afs20 
+\ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Revit Platform:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  All\line }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 
+\hich\af1\dbch\af31505\loch\f1 Revit Version:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  2011.0\line }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+First Released For:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  2009.0\line }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Programming Language:}{
+\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  C#\line }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Skill Level:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 
+\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  High\line }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Category:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 
+\hich\af1\dbch\af31505\loch\f1  Elements\line }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Type:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+ ExternalCommand\line \line }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Subject:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  Create Grid.\line }{
+\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Summary:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  \line \hich\af1\dbch\af31505\loch\f1 
+This sample shows how to create grids and modify grids\hich\f1 \rquote \loch\f1  properties through Revit API.}{\rtlch\fcs1 \ai\af0\afs20 \ltrch\fcs0 \i\f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Classes:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  
+\par }\pard \ltrpar\ql \fi180\li180\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin180\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520\charrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+Autodesk.Revit.UI.IExternalCommand}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Autodesk.Revit.}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 
+\hich\af1\dbch\af31505\loch\f1 DB}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 
+\par 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Project Files:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 
+\hich\af1\dbch\af31505\loch\f1  }{\rtlch\fcs1 \ai\af1\afs20 \ltrch\fcs0 \i\f1\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Command.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+It contains the class Command which inherits from interface IExternalCommand and implements the Execute method.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 CreateGridsData
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+Base class of grid creation data classes which contains common data and operations.
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 GridCreationOptionData.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Data}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 
+\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  class }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 which\hich\af1\dbch\af31505\loch\f1 
+ stores the information of the way to create grids.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 GridCreationOptionForm.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+It contains a dialog which lets user choose the way to create grids.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 CreateWithSeletedCurvesData.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Data}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 
+\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  class }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 which stores the information for creating grids with selected lin
+\hich\af1\dbch\af31505\loch\f1 es/arcs.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 CreateWithSelectedCurvesForm.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+It contains a dialog which provides the options of creating grids with selected lines/arcs.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 CreateOrthogonalGridsData.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Data}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 
+\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  class }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 which stores information for creating orthogonal grids.}{\rtlch\fcs1 
+\af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 CreateOrthogonalGridsForm.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 
+It contains a dialog which provides the options of creating orthogonal grids.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 CreateRadialAndArcGridsData.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Data}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 
+\f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  class}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1  which stores information for creating radial and arc grids.}{
+\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 
+\par }{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 CreateRadialAndArcGridsForm.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 
+\f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\lang1036\langfe2052\langnp1036\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 It contains a \hich\af1\dbch\af31505\loch\f1 
+dialog which provides the options of creating radial and arc grids.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 Unit.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 It defines a static class Unit to convert unit from display unit type to Revit API
+\hich\f1 \rquote \loch\f1 s internal unit.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 EnumsAndValues.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\tx720\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 \hich\af1\dbch\af31505\loch\f1 This file contains two Enumerations and one class.}{\rtlch\fcs1 \af0\afs20 
+\ltrch\fcs0 \f0\fs20\insrsid8674520 
+\par }\pard \ltrpar\ql \fi-420\li1200\ri0\nowidctlpar\tx720\tx1200\wrapdefault\faauto\rin0\lin1200\itap0 {\rtlch\fcs1 \af39\afs20 \ltrch\fcs0 \f39\fs20\insrsid8674520 -\tab }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\insrsid8674520 
+\hich\af1\dbch\af31505\loch\f1 CreateM\hich\af1\dbch\af31505\loch\f1 ode}{\rtlch\fcs1 \af40\afs18 \ltrch\fcs0 \fs18\cf10\lang1024\langfe1024\loch\af40\hich\af1\dbch\af40\noproof\insrsid8674520 \hich\af1\dbch\af40\loch\f40  }{\rtlch\fcs1 \af1\afs20 
+\ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 enumeration lists the ways to create grids.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \fi-420\li1200\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin1200\itap0 {\rtlch\fcs1 \af39\afs20 \ltrch\fcs0 \fs20\loch\af39\hich\af39\dbch\af40\insrsid8674520 -\tab }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 
+\fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 BubbleLocation enumeration lists bubble locations of grids.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \af39\afs20 \ltrch\fcs0 \fs20\loch\af39\hich\af39\dbch\af40\insrsid8674520 -\tab }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 
+Class Values contains common const values used in transforming between degrees and radians.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 Validation.cs}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\lang1036\langfe2052\loch\af0\hich\af0\dbch\af40\langnp1036\insrsid8674520 
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\lang1036\langfe2052\loch\af1\hich\af1\dbch\af40\langnp1036\insrsid8674520 \hich\af1\dbch\af40\loch\f1 
+This file contains static functions to validate input data before creating grids.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\lang1036\langfe2052\loch\af0\hich\af0\dbch\af40\langnp1036\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \ab\af0\afs20 \ltrch\fcs0 \b\fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 Description:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1  }{
+\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 This sample provides following functionalities.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \fi-360\li360\ri0\nowidctlpar\tx360\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 -\tab \hich\af1\dbch\af40\loch\f1 
+Let user create grids on the base of the selected lines/arcs.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 -\tab \hich\af1\dbch\af40\loch\f1 Let user generate orthogonal linea\hich\af1\dbch\af40\loch\f1 
+r grids with specified origin, spacing of X and Y directions, numbers of X and Y direction grids. }{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 -\tab \hich\af1\dbch\af40\loch\f1 
+Let user generate radial and arc grids with specified center, span of grids, spacing between concentric arcs and number of rays in the specified span. Even\hich\af1\dbch\af40\loch\f1 
+ the user can specify radius of the first arc grid and distance from center to the start points of radial grids. 
+\par }\pard \ltrpar\ql \fi-360\li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 -\tab \hich\af1\dbch\af40\loch\f1 
+Let user set the label for the first grid like A or 1 and set the location of the bubble for grids to be created.
+\par -\tab \hich\af1\dbch\af40\loch\f1 The length units within \hich\af1\dbch\af40\loch\f1 UI should accord with current project unit setting.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \ab\af1\afs20 \ltrch\fcs0 \b\fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 Instructions:}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\cf2\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1  }{
+\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\cf2\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 Open Revit application and execute the command.
+\par }\pard \ltrpar\ql \fi-360\li360\ri0\nowidctlpar\tx360\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 1.\tab Create grids with selected lines/arcs.
+
+\par }\pard \ltrpar\ql \li765\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin765\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 a.   Select some lines/arcs in current project.}{\rtlch\fcs1 
+\af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 b.   Execute the command.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \fi-400\li1166\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin1166\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 \hich\f1 c.   Check the option \'93
+\hich\af1\dbch\af40\loch\f1 \hich\f1 Create grids with selected lines or arcs\'94.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \fi-360\li1125\ri0\nowidctlpar\tx1125\wrapdefault\faauto\rin0\lin1125\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 d.\tab \hich\f1 In the next \'93\loch\f1 
+\hich\f1 Create Grids with Selected Lines/Arcs\'94\loch\f1 \hich\f1  dialog specify the values and click button \'93\loch\f1 \hich\f1 Create Grids\'94.
+\par }\pard \ltrpar\ql \li765\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin765\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 
+Expected result: Grids are created on the base of selected lines/arcs.}{\rtlch\fcs1 \af2\afs20 \ltrch\fcs0 \fs20\loch\af2\hich\af2\dbch\af40\insrsid8674520 \hich\af2\dbch\af40\loch\f2  }{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 
+\fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 If an arc is a circle, two g\hich\af1\dbch\af40\loch\f1 irds will be created separately for the upper and lower parts of the circle.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 
+\fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par 
+\par }\pard \ltrpar\ql \fi-360\li360\ri0\nowidctlpar\tx360\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 2.\tab Create orthogonal grids.
+\par }\pard \ltrpar\ql \fi-360\li1080\ri0\nowidctlpar\tx1080\wrapdefault\faauto\rin0\lin1080\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 a.\tab Execute the command.
+\par }\pard \ltrpar\ql \fi-360\li1080\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin1080\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 b.\tab \hich\f1 Check the option \'93\loch\f1 \hich\f1 
+Create a batch of orthogonal grids\'94.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \fi-360\li1080\ri0\nowidctlpar\tx1080\wrapdefault\faauto\rin0\lin1080\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 c.\tab \hich\f1 In the next \'93\loch\f1 
+\hich\f1 Create Orthogonal Grids\'94\loch\f1  dialog specify the values a\hich\af1\dbch\af40\loch\f1 \hich\f1 nd click button \'93\loch\f1 \hich\f1 Create Grids\'94.}{\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+
+\par }\pard \ltrpar\ql \li720\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin720\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 
+Expected result: Orthogonal grids are created according to specified values.
+\par }\pard \ltrpar\ql \li360\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \fi-360\li360\ri0\nowidctlpar\tx360\wrapdefault\faauto\rin0\lin360\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 3.\tab Create radial and arc grids.
+\par }\pard \ltrpar\ql \fi-360\li1080\ri0\nowidctlpar\tx1080\wrapdefault\faauto\rin0\lin1080\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 a.\tab Execute the command.
+\par }\pard \ltrpar\ql \fi-360\li1080\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin1080\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 b.\tab \hich\f1 Check the option \'93\loch\f1 \hich\f1 
+Create a batch of radial and arc grids\'94.
+\par \hich\af1\dbch\af40\loch\f1 c.\tab \hich\f1 In the next \'93\hich\af1\dbch\af40\loch\f1 \hich\f1 Create Radial and Arc Grids\'94\loch\f1 \hich\f1  dialog specify the values and click button \'93\loch\f1 \hich\f1 Create Grids\'94.}{\rtlch\fcs1 \af0\afs20 
+\ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
+\par }\pard \ltrpar\ql \li720\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin720\itap0 {\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \fs20\loch\af1\hich\af1\dbch\af40\insrsid8674520 \hich\af1\dbch\af40\loch\f1 
+Expected result: Radial and arc grids are created according to specified values. 
+\par }\pard \ltrpar\ql \li0\ri0\nowidctlpar\wrapdefault\faauto\rin0\lin0\itap0 {\rtlch\fcs1 \af0\afs20 \ltrch\fcs0 \fs20\loch\af0\hich\af0\dbch\af40\insrsid8674520 
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SDK/Samples/GridCreation/CS/Unit.cs

@@ -0,0 +1,82 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Autodesk.Revit;
+using System.Configuration;
+using System.Reflection;
+
+using Autodesk.Revit.DB;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// Provides static functions to convert unit
+    /// </summary>
+    static class Unit
+    {
+        #region Methods
+        /// <summary>
+        /// Convert the value get from RevitAPI to the value indicated by ForgeTypeId
+        /// </summary>
+        /// <param name="to">ForgeTypeId indicates unit of target value</param>
+        /// <param name="value">value get from RevitAPI</param>
+        /// <returns>Target value</returns>
+        public static double CovertFromAPI(ForgeTypeId to, double value)
+        {
+            return value *= ImperialDutRatio(to);
+        }
+
+        /// <summary>
+        /// Convert a value indicated by ForgeTypeId to the value used by RevitAPI
+        /// </summary>
+        /// <param name="value">Value to be converted</param>
+        /// <param name="from">ForgeTypeId indicates the unit of the value to be converted</param>
+        /// <returns>Target value</returns>
+        public static double CovertToAPI(double value, ForgeTypeId from )
+        {
+            return value /= ImperialDutRatio(from);
+        }
+
+        /// <summary>
+        /// Get ratio between value in RevitAPI and value to display indicated by ForgeTypeId
+        /// </summary>
+        /// <param name="unit">ForgeTypeId indicates display unit type</param>
+        /// <returns>Ratio </returns>
+        private static double ImperialDutRatio(ForgeTypeId unit) 
+        {
+            if (unit == UnitTypeId.Feet) return 1;
+            if (unit == UnitTypeId.FeetFractionalInches) return 1;
+            if (unit == UnitTypeId.Inches) return 12;
+            if (unit == UnitTypeId.FractionalInches) return 12;
+            if (unit == UnitTypeId.Meters) return 0.3048;
+            if (unit == UnitTypeId.Centimeters) return 30.48;
+            if (unit == UnitTypeId.Millimeters) return 304.8;
+            if (unit == UnitTypeId.MetersCentimeters) return 0.3048;
+            return 1;
+        }
+        #endregion
+    }
+}

SDK/Samples/GridCreation/CS/Validation.cs

@@ -0,0 +1,319 @@
+//
+// (C) Copyright 2003-2019 by Autodesk, Inc.
+//
+// Permission to use, copy, modify, and distribute this software in
+// object code form for any purpose and without fee is hereby granted,
+// provided that the above copyright notice appears in all copies and
+// that both that copyright notice and the limited warranty and
+// restricted rights notice below appear in all supporting
+// documentation.
+//
+// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
+// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
+// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
+// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
+// UNINTERRUPTED OR ERROR FREE.
+//
+// Use, duplication, or disclosure by the U.S. Government is subject to
+// restrictions set forth in FAR 52.227-19 (Commercial Computer
+// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
+// (Rights in Technical Data and Computer Software), as applicable.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows.Forms;
+using System.Resources;
+using System.Collections;
+
+using Autodesk.Revit.UI;
+
+namespace Revit.SDK.Samples.GridCreation.CS
+{
+    /// <summary>
+    /// Class to validate input data before creating grids
+    /// </summary>
+    public static class Validation
+    {
+        // Get the resource contains strings
+        static ResourceManager resManager = Properties.Resources.ResourceManager;
+
+        /// <summary>
+        /// Validate numbers in UI
+        /// </summary>
+        /// <param name="number1Ctrl">Control contains number information</param>
+        /// <param name="number2Ctrl">Control contains another number information</param>
+        /// <returns>Whether the numbers are validated</returns>
+        public static bool ValidateNumbers(Control number1Ctrl, Control number2Ctrl)
+        {
+            if (!ValidateNumber(number1Ctrl) || !ValidateNumber(number2Ctrl))
+            {
+                return false;
+            }
+
+            if (Convert.ToUInt32(number1Ctrl.Text) == 0 && Convert.ToUInt32(number2Ctrl.Text) == 0)
+            {
+                ShowWarningMessage(resManager.GetString("NumbersCannotBeBothZero"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                number1Ctrl.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Validate number value
+        /// </summary>
+        /// <param name="numberCtrl">Control contains number information</param>
+        /// <returns>Whether the number value is validated</returns>
+        public static bool ValidateNumber(Control numberCtrl)
+        {
+            if (!ValidateNotNull(numberCtrl, "Number"))
+            {
+                return false;
+            }
+
+            try
+            {
+                uint number = Convert.ToUInt32(numberCtrl.Text);
+                if (number > 200)
+                {
+                    ShowWarningMessage(resManager.GetString("NumberBetween0And200"),
+                                       Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                    numberCtrl.Focus();
+                    return false;
+                }
+            }
+            catch (OverflowException)
+            {
+                ShowWarningMessage(resManager.GetString("NumberBetween0And200"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                numberCtrl.Focus();
+                return false;
+            }
+            catch (Exception)
+            {
+                ShowWarningMessage(resManager.GetString("NumberFormatWrong"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                numberCtrl.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Validate length value
+        /// </summary>
+        /// <param name="lengthCtrl">Control contains length information</param>
+        /// <param name="typeName">Type of length</param>
+        /// <param name="canBeZero">Whether the length can be zero</param>
+        /// <returns>Whether the length value is validated</returns>
+        public static bool ValidateLength(Control lengthCtrl, String typeName, bool canBeZero)
+        {
+            if (!ValidateNotNull(lengthCtrl, typeName))
+            {
+                return false;
+            }
+
+            try
+            {
+                double length = Convert.ToDouble(lengthCtrl.Text);
+                if (length <= 0 && !canBeZero)
+                {
+                    ShowWarningMessage(resManager.GetString(typeName + "CannotBeNegativeOrZero"),
+                                       Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                    lengthCtrl.Focus();
+                    return false;
+                }
+                else if (length < 0 && canBeZero)
+                {
+                    ShowWarningMessage(resManager.GetString(typeName + "CannotBeNegative"),
+                                       Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                    lengthCtrl.Focus();
+                    return false;
+                }
+            }
+            catch (Exception)
+            {
+                ShowWarningMessage(resManager.GetString(typeName + "FormatWrong"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                lengthCtrl.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Validate coordinate value
+        /// </summary>
+        /// <param name="coordCtrl">Control contains coordinate information</param>
+        /// <returns>Whether the coordinate value is validated</returns>
+        public static bool ValidateCoord(Control coordCtrl)
+        {
+            if (!ValidateNotNull(coordCtrl, "Coordinate"))
+            {
+                return false;
+            }
+
+            try
+            {
+                Convert.ToDouble(coordCtrl.Text);
+            }
+            catch (Exception)
+            {
+                ShowWarningMessage(resManager.GetString("CoordinateFormatWrong"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                coordCtrl.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Validate start degree and end degree
+        /// </summary>
+        /// <param name="startDegree">Control contains start degree information</param>
+        /// <param name="endDegree">Control contains end degree information</param>
+        /// <returns>Whether the degree values are validated</returns>
+        public static bool ValidateDegrees(Control startDegree, Control endDegree)
+        {
+            if (!ValidateDegree(startDegree) || !ValidateDegree(endDegree))
+            {
+                return false;
+            }
+
+            if (Math.Abs(Convert.ToDouble(startDegree.Text) - Convert.ToDouble(endDegree.Text)) <= Double.Epsilon)
+            {
+                ShowWarningMessage(resManager.GetString("DegreesAreTooClose"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                startDegree.Focus();
+                return false;
+            }
+
+            if (Convert.ToDouble(startDegree.Text) >= Convert.ToDouble(endDegree.Text))
+            {
+                ShowWarningMessage(resManager.GetString("StartDegreeShouldBeLessThanEndDegree"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                startDegree.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Validate degree value
+        /// </summary>
+        /// <param name="degreeCtrl">Control contains degree information</param>
+        /// <returns>Whether the degree value is validated</returns>
+        public static bool ValidateDegree(Control degreeCtrl)
+        {
+            if (!ValidateNotNull(degreeCtrl, "Degree"))
+            {
+                return false;
+            }
+
+            try
+            {
+                double startDegree = Convert.ToDouble(degreeCtrl.Text);
+                if (startDegree < 0 || startDegree > 360)
+                {
+                    ShowWarningMessage(resManager.GetString("DegreeWithin0To360"),
+                                       Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                    degreeCtrl.Focus();
+                    return false;
+                }
+            }
+            catch (Exception)
+            {
+                ShowWarningMessage(resManager.GetString("DegreeFormatWrong"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                degreeCtrl.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Validate label
+        /// </summary>
+        /// <param name="labelCtrl">Control contains label information</param>
+        /// <param name="allLabels">List contains all labels in Revit document</param>
+        /// <returns>Whether the label value is validated</returns>
+        public static bool ValidateLabel(Control labelCtrl, ArrayList allLabels)
+        {
+            if (!ValidateNotNull(labelCtrl, "Label"))
+            {
+                return false;
+            }
+
+            String labelToBeValidated = labelCtrl.Text;
+            foreach (String label in allLabels)
+            {
+                if (label == labelToBeValidated)
+                {
+                    ShowWarningMessage(resManager.GetString("LabelExisted"),
+                                       Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                    labelCtrl.Focus();
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Assure value is not null
+        /// </summary>
+        /// <param name="control">Control contains information needs to be checked</param>
+        /// <param name="typeName">Type of information</param>
+        /// <returns>Whether the value is not null</returns>
+        public static bool ValidateNotNull(Control control, String typeName)
+        {
+            if (String.IsNullOrEmpty(control.Text.TrimStart(' ').TrimEnd(' ')))
+            {
+                ShowWarningMessage(resManager.GetString(typeName + "CannotBeNull"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                control.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Assure two labels are not same
+        /// </summary>
+        /// <param name="label1Ctrl">Control contains label information</param>
+        /// <param name="label2Ctrl">Control contains label information</param>
+        /// <returns>Whether the labels are same</returns>
+        public static bool ValidateLabels(Control label1Ctrl, Control label2Ctrl)
+        {
+            if (label1Ctrl.Text.TrimStart(' ').TrimEnd(' ') == label2Ctrl.Text.TrimStart(' ').TrimEnd(' '))
+            {
+                ShowWarningMessage(resManager.GetString("LabelsCannotBeSame"),
+                                   Properties.Resources.ResourceManager.GetString("FailureCaptionInvalidValue"));
+                label1Ctrl.Focus();
+                return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Show a warning message box
+        /// </summary>
+        /// <param name="message">Message</param>
+        /// <param name="caption">title of message box</param>
+        public static void ShowWarningMessage(String message, String caption)
+        {
+            TaskDialog.Show(caption, message, TaskDialogCommonButtons.Ok);
+        }
+    }
+}