Recently, I got a crash dump file from a customer. I could track the problem down to a class that could contain incorrect data, but I only got a void-pointer to the class,
This is mentioned in MSDN. It doesn't look like there's a nice solution within the Watch window (you can get the decorated name of your class from a listing I guess).
Your "silly-named namespace" idea would work okay, you could also just declare an identical class with a silly name and cast to that type instead.