Basically, I am trying to create my own DragAndDropProvider, and tried to created my own DragVisual during DragAndDrop events. And I find the best visual for DragAndDrop is the Separator visual effect from built-in support. So I set the default property "IsDragDropEnabled = True" in my RadTreeView, but it seems if I do so, my DragAndDropProvider won't trigger anymore.
The XAML code looks like this:
What should I do to benefit from both the customized DragAndDropProvider and built-in DragDrop Separator?