The built-in drag-and-drop mechanism in RadTreeView should be revisited. Currently some events are not raised properly under certain conditions.

When self reference data binding is in place, editing a root node throws a null reference exception.

Nodes are not always dropped successfully on another treeview when the source nodes are selected.

Some nodes do not auto-expand when hovered while dragging nodes.

DragEnding event is not fired in some cases.

Sometimes, e.Node and e.TargetNode are null in the DragEnded event handler

In RadTreeView, if AllowPlusMinusAnimation property is true and LoadOnDemand is true as well, plus/minus symbols disappears.

RadTreeView should be able to bind to subproperties.