protected override void OnEndDrag(UIElement dragElement, bool abort)
{
Target target = Target;
bool isShiftKeyDown = GetIsShiftKeyDown(DockControl);
DockControl.ClearValue(IsShiftKeyDownPropertyKey);
ShowsDockControlGuide = false;
PaneWithGuide = null;
Target = Target.Empty;
RestoreCursor(dragElement as FrameworkElement);
WindowHandler.EndDrag();
if (!abort)
{
Drop(target, isShiftKeyDown);
}
}