VitNX_TreeView.StartDrag Method

protected override void StartDrag()
 {
     if (!AllowMoveNodes)
     {
         _provisionalDragging = false;
         return;
     }
 
     // Create initial list of nodes to drag
     _dragNodes = new List<VitNX_TreeNode>();
     foreach (var node in SelectedNodes)
         _dragNodes.Add(node);
 
     // Clear out any nodes with a parent that is being dragged
     foreach (var node in _dragNodes.ToList())
     {
         if (node.ParentNode == null)
             continue;
 
         if (_dragNodes.Contains(node.ParentNode))
             _dragNodes.Remove(node);
     }
 
     _provisionalDragging = false;
 
     Cursor = Cursors.SizeAll;
 
     base.StartDrag();
 }