Hi
I have created a Silverlight application into which I want to load a Diagram through xml file.
This is what my LoadDiagram logic:

private void btnLoadClick(object sender, RoutedEventArgs e)
       {            
    OpenFileDialog openFileDlg = new OpenFileDialog();
   bool? isOpenFileDlgShown = openFileDlg.ShowDialog();
       if (isOpenFileDlgShown == true)
               {
                   FileInfo file = openFileDlg.File;                   
                  
                   using (var stream = file.OpenRead())
                   {
                       diagram.LoadFromXml(stream);
                   }

               }
       }

But when I run this I am getting the following exception:

{System.NullReferenceException: Object reference not set to an instance of an object.
   at MindFusion.Diagramming.Silverlight.Diagram.LoadFromXml(XDocument document)
   at MindFusion.Diagramming.Silverlight.Diagram.LoadFromXml(Stream stream)
   at LoadDiagram.MainPage.btnLoadClick(Object sender, RoutedEventArgs e)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEve
ntArgs e)
   at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)}

Here the xml file iam trying to load is an xml file created/saved from another silverlight applicaton.
The thing i don't understand here If I try this from the earlier application where i am saving, i could able to load.
But when i do this in another application, the above mentioned exception is coming.

What is missing here, can anyone help me out?

Thanks & Regards
Padma

Yes ..you are rigjht. I fotgot to call the RegisterItemClass.
Its working now.

Thanks & Regards
Padma