Currently, the DragDropBehavior<TState> class derives from DependencyObject which prevents it from inheritting the data context of its parent element. Change its parent class from DependencyObject to Freezable, so the data context can be automatically accessed. This is meaningful when you create a custom behavior and add a DependencyProperty that you want to data bind in the XAML. 

Adding dragOrder binding property on DragBehavior which support items reorder, so that items that are bound to Services/Database can be reordered.

The responsibility for reordering items on the server side should be taken by the developer, via mediator class-es that handle the reordering, or in a multi- layer abstraction able to handle the logic.

Enable Drag Drop using right mouse button