Message: 'RoutingOptions' property is read-only and cannot be set from markup. Line '1' Position '1551'.


The save is as follows:

     DiagramState diagramState = new DiagramState();
           XmlDocument doc = new XmlDocument();
           diagram.SaveToXml(doc);

           StringWriter stringWriter = new StringWriter();
           XmlTextWriter xmlWriter = new XmlTextWriter(stringWriter);
           doc.WriteTo(xmlWriter);

           diagramState.Diagram = stringWriter.ToString();
      
           State.Data = diagramState;

and load as follows:

           DiagramState diagramState = (DiagramState)State.Data;

           XmlDocument doc = new XmlDocument();
           doc.LoadXml(diagramState.Diagram);
           diagram.LoadFromXml(doc);

error thrown at line:

diagram.LoadFromXml(doc);


but stack trace just has:    at System.Windows.Markup.XamlReaderHelper.ThrowExceptionWithLine(String message)

Inner exception is null.

Is DeviceDiagram a property of your custom nodes which points back to the Diagram object?

Stoyan

Are DeviceDiagram instances contained within your custom nodes?