public void InitMockup() { var viewNode = new ViewNodeControl() { Width = 100, Height = 50, Title = "First", AllowDrop = true }; viewNode.HighlightAdorner = new HighlightAdorner(viewNode); viewNode.LinkAdorner = new LinkAdorner(viewNode); viewNode.Drop += LinkAction; viewNode.IsSelectedChanged += (node, isSelected) => { if (isSelected) { NodesList.ToList().ForEach(n => { if (n.Equals(node) == false) { (n as ISelectable).IsSelected = false; } }); } }; NodesList = new ObservableCollection <UIElement>(); NodesList.Add(viewNode); viewNode = new ViewNodeControl() { Width = 100, Height = 50, Title = "Second", AllowDrop = true }; viewNode.HighlightAdorner = new HighlightAdorner(viewNode); viewNode.LinkAdorner = new LinkAdorner(viewNode); viewNode.Drop += LinkAction; viewNode.IsSelectedChanged += (node, isSelected) => { if (isSelected) { NodesList.ToList().ForEach(n => { if (n.Equals(node) == false) { (n as ISelectable).IsSelected = false; } }); } }; NodesList.Add(viewNode); }