My solution was fine in Visual Studio 2008 earlier today. However when I opened up my program in 2010 and double clicked on my main form I get the above error and the WHOLE of Visual Studio shuts down and says there was a problem. I have tried it numerous times and it just keeps closing down and trying to restart. I'm guessing if I solve the above it won't shut down. Any ideas?
EDIT: Typo's and for further information, I had toolkit version 4.1.5 installed when I tried this the first time. I then installed version 4.1.6 to see if that helped solve the problem and it didn't. Also yes I have modified the references to the correct versions and added the design dll which came along with 4.1.6. I've even added the new dll's into the global assembly cache! I'm confused