ES-975464 - Resolve the ReadMe file length issue in this sample repository

README.md

@@ -1,2 +1,61 @@
-# How to copy a column and paste it as a new column in wpf treegrid?
-This sample illustrates how to copy a column and paste it as a new column in wpf treegrid
+# How to Copy a Column and Paste it as a New Column in WPF TreeGrid?
+
+This sample illustrates how to copy a column and paste it as a new column in [WPF TreeGrid](https://www.syncfusion.com/wpf-controls/treegrid) (SfTreeGrid).
+
+You can copy a column and paste it into a new position using the context menu option in TreeGrid.
+
+### XAML
+
+``` xml
+<syncfusion:SfTreeGrid.HeaderContextMenu>
+    <ContextMenu ItemsSource="{Binding Menu,Source={StaticResource viewmodel}}" >
+        <ContextMenu.ItemContainerStyle>
+            <Style TargetType="MenuItem">
+                <Setter Property="Command" Value="{Binding MyCommand,Source={StaticResource  viewmodel}}">
+                </Setter>
+                <Setter Property="CommandParameter" >
+                    <Setter.Value>
+                        <MultiBinding Converter="{StaticResource ResourceKey=converter}">
+                            <Binding RelativeSource="{RelativeSource Self}"/>
+                            <Binding />
+                        </MultiBinding>
+                    </Setter.Value>
+                </Setter>
+            </Style>
+        </ContextMenu.ItemContainerStyle>
+    </ContextMenu>
+ </syncfusion:SfTreeGrid.HeaderContextMenu>
+```
+
+### C#
+
+``` c#
+private static void OnCopyColumn(object obj)
+{
+    if (obj is TreeGridColumnContextMenuInfo)
+    {
+        // The selected column is stored into CopiedColumn.
+        CopiedColumn = (obj as TreeGridColumnContextMenuInfo).Column;
+    }
+}
+
+private static void OnPasteColumn(object obj)
+{
+    if (obj is TreeGridColumnContextMenuInfo && CopiedColumn != null)
+    {
+        var grid = (obj as TreeGridColumnContextMenuInfo).TreeGrid;
+        //  Get the index for corresponding column.
+        var index = grid.Columns.IndexOf((obj as TreeGridColumnContextMenuInfo).Column);
+        // Copy the column and insert based on the index position.
+        grid.Columns.Insert(index + 1, new TreeGridTextColumn() { MappingName = CopiedColumn.MappingName });
+    }
+}
+```
+
+### Copy the ID column using context menu
+
+![Copying the ID column using context menu](CopyingUsingContextMenu.png)
+
+### Paste the ID column after ReportsTo column
+
+![Pasting the ID column using context menu](PastingUsingContextMenu.png)