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

Author: SreemonPremkumarM

README.md

@@ -1,2 +1,7 @@
 # How to drag and drop rows in wpf and uwp between listview and treegrid?
+
 This example illustrates how to drag and drop rows in wpf and uwp between listview and treegrid.
+
+You can drag the item from ListView and drop into TreeGrid by overriding the [GetDropPosition](https://help.syncfusion.com/cr/uwp/Syncfusion.UI.Xaml.TreeGrid.TreeGridRowDragDropController.html#Syncfusion_UI_Xaml_TreeGrid_TreeGridRowDragDropController_GetDropPosition_Windows_UI_Xaml_DragEventArgs_Syncfusion_UI_Xaml_ScrollAxis_RowColumnIndex_), [ProcessOnDragOver](https://help.syncfusion.com/cr/uwp/Syncfusion.UI.Xaml.TreeGrid.TreeGridRowDragDropController.html#Syncfusion_UI_Xaml_TreeGrid_TreeGridRowDragDropController_ProcessOnDragOver_Windows_UI_Xaml_DragEventArgs_Syncfusion_UI_Xaml_ScrollAxis_RowColumnIndex_), and [ProcessOnDrop](https://help.syncfusion.com/cr/uwp/Syncfusion.UI.Xaml.TreeGrid.TreeGridRowDragDropController.html#Syncfusion_UI_Xaml_TreeGrid_TreeGridRowDragDropController_ProcessOnDrop_Windows_UI_Xaml_DragEventArgs_Syncfusion_UI_Xaml_ScrollAxis_RowColumnIndex_) methods in the [TreeGridRowDragDropController](https://help.syncfusion.com/cr/uwp/Syncfusion.UI.Xaml.TreeGrid.TreeGridRowDragDropController.html) class.
+
+In ListView, use the `DragItemsStarting` event and add dragged item. After dropping in TreeGrid, the dragged item is added to TreeGrid based on the dropped position.