I am using the trick where I attach a TextBox to the bottom of a node.  I get a null reference error when I deserialize the diagram.  If you comment out the "AttachTo" line of code below then there is no error.  This type of error does not occur if I replace the TextBox/DiagamNodeAdapter with another shape node for example.  Do you know what is causing this deserialization error?
      

       public Window1()
       {
           InitializeComponent();
           Diagram d = new Diagram();
           Content = d;
           ShapeNode shapeNode = d.Factory.CreateShapeNode(new Rect(10, 10, 20, 20));
           TextBox tb = new TextBox();
           tb.Text = "Test";
           d.Nodes.Add(tb);
           DiagramNodeAdapter adapter = (DiagramNodeAdapter)Diagram.GetDiagramItem(tb);
           adapter.Bounds = new Rect(shapeNode.Bounds.BottomLeft.X, shapeNode.Bounds.BottomLeft.Y, 40, 20);
           adapter.AttachTo(shapeNode, AttachToNode.BottomLeft);
           XmlDocument doc = new XmlDocument();
           d.SaveToXml(doc);
           d.LoadFromXml(doc);
       }

This version should fix it:
https://mindfusion.eu/_beta/wpfdiag221.zip

Stoyan

I have the same error whenever I add a TableNode to a diagram. Even if it is the only object in my diagram. The SaveToXml works fine... it fails on the LoadFromXml.

Will this patch also fix this?  When will it be "officially" released?  I can't use a beta release in our software.

Here's the node that I am adding:

Dim nod As MindFusion.Diagramming.Wpf.TableNode
nod = Me.Factory.CreateTableNode(0, 0, 100, 120, 2, 0)
nod.Font.Size = 8
nod.ConnectionStyle = MindFusion.Diagramming.Wpf.TableConnectionStyle.Table
nod.CaptionFormat.Alignment = StringAlignment.Center
nod.CaptionFormat.LineAlignment = StringAlignment.Center
nod.CellFrameStyle = MindFusion.Diagramming.Wpf.CellFrameStyle.None
nod.CaptionBackBrush = System.Windows.Media.Brushes.LightGray
nod.Brush = System.Windows.Media.Brushes.LemonChiffon
nod.AllowDrop = True
nod.Expandable = False
nod.EnableStyledText = True
nod.ResizeToFitText(True)
nod.Columns(0).ColumnStyle = ColumnStyle.FixedWidth
nod.Columns(0).Width = 10
nod.Columns(1).ColumnStyle = ColumnStyle.AutoWidth

Check the private messages page. The version there should fix that.