Just letting you know that it's not listed here...
RadDragDropService | Telerik Presentation Framework | Telerik UI for WinForms
Sorry, not being picky but there's a typo also on this page
Drag Drop | Task Board | Telerik UI for WinForms
By default, RadTaskBord
By default, RadTaskBoard
I have also updated your Telerik points.
Dess | Tech Support Engineer, Principal