Code

      void m_mfDiagram_NodeSelected(object sender, NodeEventArgs e)
        {
            if (e.Node is MyDiagramNodeAdapter)
            {
                MyDiagramNodeAdapter _Node = (e.Node as MyDiagramNodeAdapter);
                _Node.Items.Items.MoveCurrentTo(_Node.Item);
            };
        } 

Code

  MyDiagramNodeAdapter _Node = new MyDiagramNodeAdapter(_DiagramItem as UIElement);

            _Node.Item = _DiagramItem;
            _Node.Items = this;


            _DiagramItem.mfDiagramItem = _Node as MyDiagramNodeAdapter;
            m_mfDiagram.NodeSelected += m_mfDiagram_NodeSelected;

            m_mfDiagram.Nodes.Add(_Node);
 

Code

    internal class MyDiagramNodeAdapter : MindFusion.Diagramming.Wpf.DiagramNodeAdapter
    {
        public DiagramPanel.DiagramItem Item { get; set; }
        public ItemsControl Items { get; set; }

        public MyDiagramNodeAdapter(UIElement node)
            : base(node)
        {
        }

        protected MyDiagramNodeAdapter(MindFusion.Diagramming.Wpf.DiagramItem prototype)
            : base(prototype)
        {
            this.Item = (prototype as MyDiagramNodeAdapter).Item;
            this.Items = (prototype as MyDiagramNodeAdapter).Items;
        }

    }