WorkflowMarkupSerializer doesn’t keep positions in a state machine workflow

[Win8128]

I am using WorkflowMarkupSerializer to save a statemachine workflow - it saves the states OK, but does not keep their positions. The code to write the workflow is here:

using (XmlWriter xmlWriter = XmlWriter.Create(fileName))
{
WorkflowMarkupSerializer markupSerializer
= new WorkflowMarkupSerializer();
markupSerializer.Serialize(xmlWriter, workflow);
}

The code to read the workflow is:

        DesignerSerializationManager dsm
        = new DesignerSerializationManager();
    using (dsm.CreateSession())
    {
        using (XmlReader xmlReader
            = XmlReader.Create(fileName))
        {
            //deserialize the workflow from the XmlReader
            WorkflowMarkupSerializer markupSerializer
                = new WorkflowMarkupSerializer();
            workflow = markupSerializer.Deserialize(
                dsm, xmlReader) as Activity;

            if (dsm.Errors.Count > 0)
            {
                WorkflowMarkupSerializationException error
                    = dsm.Errors\[0\]
                      as WorkflowMarkupSerializationException;
                throw error;
            }
        }
     }

Does anyone know how to save the positions of the states?

[Win8128]

OK I have found an answer at the following link[^] Search for: .layout