private void UnsubscribeFromDragDropEvents()
{
RadDragAndDropManager.RemoveDropQueryHandler(this.AssociatedObject, OnDropQuery);
RadDragAndDropManager.RemoveDropInfoHandler(this.AssociatedObject, OnDropInfo);
RadDragAndDropManager.RemoveDragQueryHandler(this.AssociatedObject, OnDragQuery);
RadDragAndDropManager.RemoveDragInfoHandler(this.AssociatedObject, OnDragInfo);
}