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[.net] Tao Framework Bug?

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I'm using the Tao framework for a graphic-intensive part of an application at work. One of our team, and also the lead programmer for our large corporation, is having a problem with that part in that every time the SimpleOpenGLControl is disposed it has a NullReferenceException inside SimpleOpenGLControl.DestroyContexts. What could be causing this? I used .NET reflector to look at the source for this segment and I didn't see any reason why this would be happening. No others of our development team have this problem. He is running it on an old Toshiba laptop with a very low-end graphics card. Any ideas?

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Guest Anonymous Poster
I found that it throws the exception at WglDeleteContext(IntPtr RC) every time inside DestroyContexts(). Any ideas why? If I do not handle the exception and let execution continue, the next time the user wants to open an openGL window the app freezes.

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