When I use the method, SaveToXml() method, I am getting the below exception.

The given key was not present in the dictionary

Code used is,


           Stream str = new MemoryStream();
           _diagram.SaveToXml(str);

Can someone help to solve this problem? How to fix this? My goal is showing the diagram in full screen mode.

Default diagram component don't have show full screen option, I need to get the xml and generate the diagram on a popup control and show that popup control and apply application full screen.

Please it's urgent and any information is greatly appreciated.

-PRaveen