private void TreeListViewNodeDrag(object sender, TreeListView.NodeDragEventArgs e)
 {
     OnNodeDrag(e);
 }
 /// <summary>
 /// Method trigger when NodeDrag event is fired on the TreeListView</summary>
 /// <param name="e">Node drag event arguments</param>
 protected virtual void OnNodeDrag(TreeListView.NodeDragEventArgs e)
 {
     TreeListView.DoDragDrop(e.Node.Tag, DragDropEffects.All);
 }