Thanks for the response. You solved my problem. However, now I run into another one. I want to make use of the drag and drop features. Therefore I wired up an eventhandler for the DragEnded event. The passed RadTreeViewDragEndedEventArgs should contain all info about the event, such as the TargetDropItem. However, In case the DropPosition is Before or After, the TargetDropItem is null. Only if the DropPosition equals to DropPosition.Inside, the TargetDropItem property is provided. Is this a bug or do I overlook something.