hiAm using Silverlight navigation framework i have the following navigation structure..
Virtualization only helps when the control only shows a small fraction of the total number of items.
(That’s true for all controls, not just GoXam Diagram.)
So whether or not that would help your situation depends on how much is normally shown in the Diagram.
Is there a reason you are unloading when switching to the “Admin” screen?
Surely saving makes sense, but I don’t see why you need to unload.
Have you read this forum topic: Performance considerations?