ES-975464 - Resolve ReadMe Length Issues in this repository

Author: SreemonPremkumarM

README.md

@@ -1,3 +1,51 @@
 # how-to-bind-columns-from-view-model-in-wpf-and-uwp-treegrid-in-mvvm
 
-This example illustrates to bind the columns from view model.
+This example illustrates to bind the columns from ViewmModel in [WPF TreeGrid](https://www.syncfusion.com/wpf-controls/treegrid) and [UWP TreeGrid](https://www.syncfusion.com/uwp-ui-controls/treegrid)
+
+You can bind the [SfTreeGrid.Columns](https://help.syncfusion.com/cr/wpf/Syncfusion.UI.Xaml.TreeGrid.SfTreeGrid.html#Syncfusion_UI_Xaml_TreeGrid_SfTreeGrid_Columns) property in ViewModel by having the binding property of `Syncfusion.SfGrid.UI.Xaml.TreeGrid.Columns` type. Thus, you can set binding to the `SfTreeGrid.Columns` property that provides DataContext of `TreeGrid` in ViewModel.
+
+## XAML code:
+
+```xml
+<syncfusion:SfTreeGrid Name="treeGrid" 
+                       Grid.Row="1" 
+                       ChildPropertyName="ReportsTo"  
+                       AutoExpandMode="AllNodesExpanded"
+                       ShowRowHeader="True" 
+                       Columns="{Binding SfGridColumns, Mode=TwoWay}"
+                       AutoGenerateColumns="False"
+                       ItemsSource="{Binding Employees}"
+                       ParentPropertyName="ID"
+                       SelfRelationRootValue="-1">
+</syncfusion:SfTreeGrid>
+```
+
+Refer to the following code example in which the TreeGrid column is populated with some `TreeGridTextColumn` when creating the ViewModel instance.
+
+## C# code
+
+```c#
+public class ViewModel: NotificationObject
+{
+    private TreeGridColumns sfGridColumns;
+    public TreeGridColumns SfGridColumns
+    {
+        get { return sfGridColumns; }
+        set
+        { this.sfGridColumns = value;
+            RaisePropertyChanged("SfGridColumns");
+        }
+    }
+
+    public ViewModel()
+    {
+        this.Employees = GetEmployeesDetails();
+        rowDataCommand = new RelayCommand(ChangeCanExecute);
+        this.sfGridColumns = new TreeGridColumns();
+        sfGridColumns.Add(new TreeGridTextColumn() { MappingName = "FirstName" });
+        sfGridColumns.Add(new TreeGridTextColumn() { MappingName = "LastName" });
+        sfGridColumns.Add(new TreeGridTextColumn() { MappingName = "Title" });
+        sfGridColumns.Add(new TreeGridTextColumn() { MappingName = "Salary" });
+    }
+}
+```