diff --git a/BuildingCoder/CmdCategories.cs b/BuildingCoder/CmdCategories.cs
index 433f1f3..fea8a4b 100644
--- a/BuildingCoder/CmdCategories.cs
+++ b/BuildingCoder/CmdCategories.cs
@@ -1,328 +1,328 @@
-#region Header
-
-//
-// CmdCategories.cs - list document and built-in categories
-//
-// Copyright (C) 2010-2021 by Jeremy Tammik, Autodesk Inc. All rights reserved.
-//
-// Keywords: The Building Coder Revit API C# .NET add-in.
-//
-
-#endregion // Header
-
-#region Namespaces
-
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using Autodesk.Revit.Attributes;
-using Autodesk.Revit.DB;
-using Autodesk.Revit.UI;
-
-#endregion // Namespaces
-
-namespace BuildingCoder
-{
-    [Transaction(TransactionMode.ReadOnly)]
-    internal class CmdCategories : IExternalCommand
-    {
-        public Result Execute(
-            ExternalCommandData commandData,
-            ref string message,
-            ElementSet elements)
-        {
-            var uiapp = commandData.Application;
-            var app = uiapp.Application;
-            var doc = uiapp.ActiveUIDocument.Document;
-            var categories = doc.Settings.Categories;
-
-            var nCategories = categories.Size;
-
-            Debug.Print(
-                "{0} categories and their parents obtained "
-                + "from the Categories collection:",
-                nCategories);
-
-            foreach (Category c in categories)
-            {
-                var p = c.Parent;
-
-                Debug.Print("  {0} ({1}), parent {2}",
-                    c.Name, c.Id.Value,
-                    null == p ? "<none>" : p.Name);
-            }
-
-            var bics = Enum.GetValues(
-                typeof(BuiltInCategory));
-
-            var nBics = bics.Length;
-
-            Debug.Print("{0} built-in categories and the "
-                        + "corresponding document ones:", nBics);
-
-            Category cat;
-            string s;
-
-            var bics_null
-                = new List<BuiltInCategory>();
-
-            var bics_exception
-                = new List<BuiltInCategory>();
-
-            foreach (BuiltInCategory bic in bics)
-            {
-                try
-                {
-                    cat = categories.get_Item(bic);
-
-                    if (null == cat)
-                    {
-                        bics_null.Add(bic);
-                        s = "<null>";
-                    }
-                    else
-                    {
-                        s = $"{cat.Name} ({cat.Id.Value})";
-                    }
-                }
-                catch (Exception ex)
-                {
-                    bics_exception.Add(bic);
-
-                    s = $"{ex.GetType().Name} {ex.Message}";
-                }
-
-                Debug.Print("  {0} --> {1}",
-                    bic.ToString(), s);
-            }
-
-            var nBicsNull = bics_null.Count;
-            var nBicsException = bics_exception.Count;
-
-#if ACCESS_HIDDEN_CATEGORIES_THROUGH_FILTERED_ELEMENT_COLLECTOR
-      // Trying to use OfClass( typeof( Category ) )
-      // throws an ArgumentException exception saying
-      // "Input type Category is not a recognized 
-      // Revit API type".
-
-      IEnumerable<Category> cats
-        = new FilteredElementCollector( doc )
-          .WhereElementIsNotElementType()
-          .WhereElementIsViewIndependent()
-          .Cast<Category>();
-
-      // Unable to cast object of type 
-      // 'Autodesk.Revit.DB.Element' to type 
-      // 'Autodesk.Revit.DB.Category':
-
-      int nCategoriesFiltered = cats.Count<Category>();
-
-      Debug.Print(
-        "{0} categories obtained from a filtered "
-        + "element collector:",
-        nCategoriesFiltered );
-
-      foreach( Category c in cats )
-      {
-        Debug.Print( "  {0}", c.Name );
-      }
-#endif // ACCESS_HIDDEN_CATEGORIES_THROUGH_FILTERED_ELEMENT_COLLECTOR
-
-            var dlg = new TaskDialog(
-                "Hidden Built-in Categories");
-
-            s =
-                $"{nCategories} categories obtained from the Categories collection;\r\n{nBics} built-in categories;\r\n{nBicsNull} built-in categories retrieve null result;\r\n{nBicsException} built-in categories throw an exception:\r\n";
-
-            Debug.Print(s);
-
-            dlg.MainInstruction = s;
-
-            s = bics_exception
-                .Aggregate(
-                    string.Empty,
-                    (a, bic) => $"{a}\n{bic}");
-
-            Debug.Print(s);
-
-            dlg.MainContent = s;
-
-            dlg.Show();
-
-            return Result.Succeeded;
-        }
-
-        #region HideLightingFixtureHosts
-
-        /// <summary>
-        ///     Hide the LightingFixtures category
-        ///     Hosts subcategory in the given view, cf.
-        ///     http://forums.autodesk.com/t5/revit-api/how-to-get-image-of-a-family-model-without-showing-host-element/td-p/5526085
-        ///     http://forums.autodesk.com/t5/revit-api/how-to-change-visibility-setting/td-p/5526076
-        ///     http://forums.autodesk.com/t5/revit-api/how-to-get-family-model-image/td-p/5494839
-        /// </summary>
-        private void HideLightingFixtureHosts(View view)
-        {
-            var doc = view.Document;
-
-            var categories = doc.Settings.Categories;
-
-            var catLightingFixtures
-                = categories.get_Item(
-                    BuiltInCategory.OST_LightingFixtures);
-
-            var subcats
-                = catLightingFixtures.SubCategories;
-
-            var catHosts = subcats.get_Item("Hosts");
-
-            //view.SetVisibility( catHosts, false ); // 2016
-            view.SetCategoryHidden(catHosts.Id, true); // 2017
-        }
-
-        #endregion // HideLightingFixtureHosts
-
-        #region ProblemAddingParameterBindingForCategory
-
-        //static Util.SpellingErrorCorrector
-        //  _spellingErrorCorrector = null;
-
-        private void ProblemAddingParameterBindingForCategory(
-            Document doc)
-        {
-            var app = doc.Application;
-
-            //if( null == _spellingErrorCorrector )
-            //{
-            //  _spellingErrorCorrector
-            //    = new Util.SpellingErrorCorrector( app );
-            //}
-
-            var sharedParametersFile
-                = app.OpenSharedParameterFile();
-
-            var group = sharedParametersFile
-                .Groups.Create("Reinforcement");
-
-            //Definition def = group.Definitions.Create( // 2014
-            //  "ReinforcementParameter", ParameterType.Text );
-
-            //ExternalDefinitionCreationOptions opt // 2021
-            //  = new ExternalDefinitionCreationOptions(
-            //    "ReinforcementParameter", ParameterType.Text );
-
-            var opt // 2022
-                = new ExternalDefinitionCreationOptions(
-                    "ReinforcementParameter", SpecTypeId.String.Text);
-
-            var def = group.Definitions.Create(opt); // 2015
-
-            // To handle both ExternalDefinitonCreationOptions 
-            // and ExternalDefinitionCreationOptions:
-
-            //def = _spellingErrorCorrector.NewDefinition(
-            //  group.Definitions, "ReinforcementParameter",
-            //  //ParameterType.Text // 2021
-            //  SpecTypeId.String.Text ); // 2022
-
-            var bics
-                = new List<BuiltInCategory>();
-
-            //bics.Add(BuiltInCategory.OST_AreaRein);
-            //bics.Add(BuiltInCategory.OST_FabricAreas);
-            //bics.Add(BuiltInCategory.OST_FabricReinforcement);
-            //bics.Add(BuiltInCategory.OST_PathRein);
-            //bics.Add(BuiltInCategory.OST_Rebar);
-
-            bics.Add(BuiltInCategory
-                .OST_IOSRebarSystemSpanSymbolCtrl);
-
-            var catset = new CategorySet();
-
-            foreach (var bic in bics)
-                catset.Insert(
-                    doc.Settings.Categories.get_Item(bic));
-
-            var binding
-                = app.Create.NewInstanceBinding(catset);
-
-            doc.ParameterBindings.Insert(def, binding,
+#region Header
+
+//
+// CmdCategories.cs - list document and built-in categories
+//
+// Copyright (C) 2010-2021 by Jeremy Tammik, Autodesk Inc. All rights reserved.
+//
+// Keywords: The Building Coder Revit API C# .NET add-in.
+//
+
+#endregion // Header
+
+#region Namespaces
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using Autodesk.Revit.Attributes;
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+
+#endregion // Namespaces
+
+namespace BuildingCoder
+{
+    [Transaction(TransactionMode.ReadOnly)]
+    internal class CmdCategories : IExternalCommand
+    {
+        public Result Execute(
+            ExternalCommandData commandData,
+            ref string message,
+            ElementSet elements)
+        {
+            var uiapp = commandData.Application;
+            var app = uiapp.Application;
+            var doc = uiapp.ActiveUIDocument.Document;
+            var categories = doc.Settings.Categories;
+
+            var nCategories = categories.Size;
+
+            Debug.Print(
+                "{0} categories and their parents obtained "
+                + "from the Categories collection:",
+                nCategories);
+
+            foreach (Category c in categories)
+            {
+                var p = c.Parent;
+
+                Debug.Print("  {0} ({1}), parent {2}",
+                    c.Name, c.Id.Value,
+                    null == p ? "<none>" : p.Name);
+            }
+
+            var bics = Enum.GetValues(
+                typeof(BuiltInCategory));
+
+            var nBics = bics.Length;
+
+            Debug.Print("{0} built-in categories and the "
+                        + "corresponding document ones:", nBics);
+
+            Category cat;
+            string s;
+
+            var bics_null
+                = new List<BuiltInCategory>();
+
+            var bics_exception
+                = new List<BuiltInCategory>();
+
+            foreach (BuiltInCategory bic in bics)
+            {
+                try
+                {
+                    cat = categories.get_Item(bic);
+
+                    if (null == cat)
+                    {
+                        bics_null.Add(bic);
+                        s = "<null>";
+                    }
+                    else
+                    {
+                        s = $"{cat.Name} ({cat.Id.Value})";
+                    }
+                }
+                catch (Exception ex)
+                {
+                    bics_exception.Add(bic);
+
+                    s = $"{ex.GetType().Name} {ex.Message}";
+                }
+
+                Debug.Print("  {0} --> {1}",
+                    bic.ToString(), s);
+            }
+
+            var nBicsNull = bics_null.Count;
+            var nBicsException = bics_exception.Count;
+
+#if ACCESS_HIDDEN_CATEGORIES_THROUGH_FILTERED_ELEMENT_COLLECTOR
+      // Trying to use OfClass( typeof( Category ) )
+      // throws an ArgumentException exception saying
+      // "Input type Category is not a recognized 
+      // Revit API type".
+
+      IEnumerable<Category> cats
+        = new FilteredElementCollector( doc )
+          .WhereElementIsNotElementType()
+          .WhereElementIsViewIndependent()
+          .Cast<Category>();
+
+      // Unable to cast object of type 
+      // 'Autodesk.Revit.DB.Element' to type 
+      // 'Autodesk.Revit.DB.Category':
+
+      int nCategoriesFiltered = cats.Count<Category>();
+
+      Debug.Print(
+        "{0} categories obtained from a filtered "
+        + "element collector:",
+        nCategoriesFiltered );
+
+      foreach( Category c in cats )
+      {
+        Debug.Print( "  {0}", c.Name );
+      }
+#endif // ACCESS_HIDDEN_CATEGORIES_THROUGH_FILTERED_ELEMENT_COLLECTOR
+
+            var dlg = new TaskDialog(
+                "Hidden Built-in Categories");
+
+            s =
+                $"{nCategories} categories obtained from the Categories collection;\r\n{nBics} built-in categories;\r\n{nBicsNull} built-in categories retrieve null result;\r\n{nBicsException} built-in categories throw an exception:\r\n";
+
+            Debug.Print(s);
+
+            dlg.MainInstruction = s;
+
+            s = bics_exception
+                .Aggregate(
+                    string.Empty,
+                    (a, bic) => $"{a}\n{bic}");
+
+            Debug.Print(s);
+
+            dlg.MainContent = s;
+
+            dlg.Show();
+
+            return Result.Succeeded;
+        }
+
+        #region HideLightingFixtureHosts
+
+        /// <summary>
+        ///     Hide the LightingFixtures category
+        ///     Hosts subcategory in the given view, cf.
+        ///     http://forums.autodesk.com/t5/revit-api/how-to-get-image-of-a-family-model-without-showing-host-element/td-p/5526085
+        ///     http://forums.autodesk.com/t5/revit-api/how-to-change-visibility-setting/td-p/5526076
+        ///     http://forums.autodesk.com/t5/revit-api/how-to-get-family-model-image/td-p/5494839
+        /// </summary>
+        private void HideLightingFixtureHosts(View view)
+        {
+            var doc = view.Document;
+
+            var categories = doc.Settings.Categories;
+
+            var catLightingFixtures
+                = categories.get_Item(
+                    BuiltInCategory.OST_LightingFixtures);
+
+            var subcats
+                = catLightingFixtures.SubCategories;
+
+            var catHosts = subcats.get_Item("Hosts");
+
+            //view.SetVisibility( catHosts, false ); // 2016
+            view.SetCategoryHidden(catHosts.Id, true); // 2017
+        }
+
+        #endregion // HideLightingFixtureHosts
+
+        #region ProblemAddingParameterBindingForCategory
+
+        //static Util.SpellingErrorCorrector
+        //  _spellingErrorCorrector = null;
+
+        private void ProblemAddingParameterBindingForCategory(
+            Document doc)
+        {
+            var app = doc.Application;
+
+            //if( null == _spellingErrorCorrector )
+            //{
+            //  _spellingErrorCorrector
+            //    = new Util.SpellingErrorCorrector( app );
+            //}
+
+            var sharedParametersFile
+                = app.OpenSharedParameterFile();
+
+            var group = sharedParametersFile
+                .Groups.Create("Reinforcement");
+
+            //Definition def = group.Definitions.Create( // 2014
+            //  "ReinforcementParameter", ParameterType.Text );
+
+            //ExternalDefinitionCreationOptions opt // 2021
+            //  = new ExternalDefinitionCreationOptions(
+            //    "ReinforcementParameter", ParameterType.Text );
+
+            var opt // 2022
+                = new ExternalDefinitionCreationOptions(
+                    "ReinforcementParameter", SpecTypeId.String.Text);
+
+            var def = group.Definitions.Create(opt); // 2015
+
+            // To handle both ExternalDefinitonCreationOptions 
+            // and ExternalDefinitionCreationOptions:
+
+            //def = _spellingErrorCorrector.NewDefinition(
+            //  group.Definitions, "ReinforcementParameter",
+            //  //ParameterType.Text // 2021
+            //  SpecTypeId.String.Text ); // 2022
+
+            var bics
+                = new List<BuiltInCategory>();
+
+            //bics.Add(BuiltInCategory.OST_AreaRein);
+            //bics.Add(BuiltInCategory.OST_FabricAreas);
+            //bics.Add(BuiltInCategory.OST_FabricReinforcement);
+            //bics.Add(BuiltInCategory.OST_PathRein);
+            //bics.Add(BuiltInCategory.OST_Rebar);
+
+            bics.Add(BuiltInCategory
+                .OST_IOSRebarSystemSpanSymbolCtrl);
+
+            var catset = new CategorySet();
+
+            foreach (var bic in bics)
+                catset.Insert(
+                    doc.Settings.Categories.get_Item(bic));
+
+            var binding
+                = app.Create.NewInstanceBinding(catset);
+
+            doc.ParameterBindings.Insert(def, binding,
                 //BuiltInParameterGroup.PG_CONSTRUCTION // 2023
-                GroupTypeId.Construction ); // 2024
-        }
-
-        #endregion // ProblemAddingParameterBindingForCategory
-
-        /// <summary>
-        ///     List names of built-in categories in document for
-        ///     https://forums.autodesk.com/t5/revit-api-forum/is-there-any-analog-of-labelutils-getlabel-builtincategory/td-p/10139961
-        /// </summary>
-        private void BuiltInCategoryNames(Document doc)
-        {
-            var categories = doc.Settings.Categories;
-
-            var bics = Enum.GetValues(
-                typeof(BuiltInCategory));
-
-            foreach (BuiltInCategory bic in bics)
-                try
-                {
-                    var cat = categories.get_Item(bic);
-
-                    Debug.Print(cat.Name);
-                }
-                catch (Exception)
-                {
-                }
-        }
-
-        #region Built-in categories for legend components
-
-        // For https://forums.autodesk.com/t5/revit-api-forum/categories-that-can-create-legend-components/m-p/9659069
-
-        private BuiltInCategory[] _bics_for_legend_component_with_FamilyInstance
-            =
-            {
-                BuiltInCategory.OST_Casework,
-                BuiltInCategory.OST_Columns,
-                BuiltInCategory.OST_Doors,
-                BuiltInCategory.OST_DuctAccessory,
-                BuiltInCategory.OST_DuctFitting,
-                BuiltInCategory.OST_DuctTerminal,
-                BuiltInCategory.OST_ElectricalEquipment,
-                BuiltInCategory.OST_Furniture,
-                BuiltInCategory.OST_LightingFixtures,
-                BuiltInCategory.OST_MechanicalEquipment,
-                BuiltInCategory.OST_PipeAccessory,
-                BuiltInCategory.OST_PipeFitting,
-                BuiltInCategory.OST_Planting,
-                BuiltInCategory.OST_PlumbingFixtures,
-                BuiltInCategory.OST_SpecialityEquipment,
-                BuiltInCategory.OST_Sprinklers,
-                BuiltInCategory.OST_StructuralColumns,
-                BuiltInCategory.OST_StructuralFoundation,
-                BuiltInCategory.OST_StructuralFraming,
-                BuiltInCategory.OST_Windows
-            };
-
-        private BuiltInCategory[] _bics_for_legend_component_with_SystemFamily
-            =
-            {
-                BuiltInCategory.OST_CableTray,
-                BuiltInCategory.OST_Ceilings,
-                BuiltInCategory.OST_Conduit,
-                BuiltInCategory.OST_CurtainWallPanels,
-                BuiltInCategory.OST_DuctCurves,
-                BuiltInCategory.OST_FlexPipeCurves,
-                BuiltInCategory.OST_Floors,
-                BuiltInCategory.OST_PipeCurves,
-                BuiltInCategory.OST_RoofSoffit,
-                BuiltInCategory.OST_Roofs,
-                BuiltInCategory.OST_StackedWalls,
-                BuiltInCategory.OST_Walls
-            };
-
-        #endregion // Built-in categories for legend components
-    }
+                GroupTypeId.Construction ); // 2024
+        }
+
+        #endregion // ProblemAddingParameterBindingForCategory
+
+        /// <summary>
+        ///     List names of built-in categories in document for
+        ///     https://forums.autodesk.com/t5/revit-api-forum/is-there-any-analog-of-labelutils-getlabel-builtincategory/td-p/10139961
+        /// </summary>
+        private void BuiltInCategoryNames(Document doc)
+        {
+            var categories = doc.Settings.Categories;
+
+            var bics = Enum.GetValues(
+                typeof(BuiltInCategory));
+
+            foreach (BuiltInCategory bic in bics)
+                try
+                {
+                    var cat = categories.get_Item(bic);
+
+                    Debug.Print(cat.Name);
+                }
+                catch (Exception)
+                {
+                }
+        }
+
+        #region Built-in categories for legend components
+
+        // For https://forums.autodesk.com/t5/revit-api-forum/categories-that-can-create-legend-components/m-p/9659069
+
+        private BuiltInCategory[] _bics_for_legend_component_with_FamilyInstance
+            =
+            {
+                BuiltInCategory.OST_Casework,
+                BuiltInCategory.OST_Columns,
+                BuiltInCategory.OST_Doors,
+                BuiltInCategory.OST_DuctAccessory,
+                BuiltInCategory.OST_DuctFitting,
+                BuiltInCategory.OST_DuctTerminal,
+                BuiltInCategory.OST_ElectricalEquipment,
+                BuiltInCategory.OST_Furniture,
+                BuiltInCategory.OST_LightingFixtures,
+                BuiltInCategory.OST_MechanicalEquipment,
+                BuiltInCategory.OST_PipeAccessory,
+                BuiltInCategory.OST_PipeFitting,
+                BuiltInCategory.OST_Planting,
+                BuiltInCategory.OST_PlumbingFixtures,
+                BuiltInCategory.OST_SpecialityEquipment,
+                BuiltInCategory.OST_Sprinklers,
+                BuiltInCategory.OST_StructuralColumns,
+                BuiltInCategory.OST_StructuralFoundation,
+                BuiltInCategory.OST_StructuralFraming,
+                BuiltInCategory.OST_Windows
+            };
+
+        private BuiltInCategory[] _bics_for_legend_component_with_SystemFamily
+            =
+            {
+                BuiltInCategory.OST_CableTray,
+                BuiltInCategory.OST_Ceilings,
+                BuiltInCategory.OST_Conduit,
+                BuiltInCategory.OST_CurtainWallPanels,
+                BuiltInCategory.OST_DuctCurves,
+                BuiltInCategory.OST_FlexPipeCurves,
+                BuiltInCategory.OST_Floors,
+                BuiltInCategory.OST_PipeCurves,
+                BuiltInCategory.OST_RoofSoffit,
+                BuiltInCategory.OST_Roofs,
+                BuiltInCategory.OST_StackedWalls,
+                BuiltInCategory.OST_Walls
+            };
+
+        #endregion // Built-in categories for legend components
+    }
 }
\ No newline at end of file