Oddest thing ever. I’ve gone into Visual Studio 2010 this morning and when I try to edit an existing WinForm or add a new Winform, I get the error “GUID should contain 32 digits with 4 dashes” come up.
To the best of my knowledge there have been no changes.
Any ideas how to fix?
You can run the designer in another instance of Visual Studio for debugging:
http://msdn.microsoft.com/en-us/library/ms996457.aspx
To me this looks like a custom exception that someone has added, can’t say I’ve seen that before and the message doesn’t sound very Microsoft-y.