We've recently upgraded from VS2008 to VS2010. The conversion of our vb.net Windows Forms app went well, but we're now having big problems with the forms designer.
Pretty much any change to the layout of a form (sometimes just a solution rebuild) will work once, but on recompile, the IDE designer refuses to display the form, the error message being a null-reference exception (with no details as to what).
Closing and restarting VS2010 will cure it, but only for one compile cycle - and it's obviously not practical to close and reopen every time. Closing and reopening the form does not fix it.
We had these very occasionally before, if there was something wrong in the form's load event, or more rarely for random reasons, but since VS2008 SP1 this was never serious.
Whereas now with VS2010, it's now every form, every compile.
It's completely unworkable, and we've had to revert to VS2008 for winforms dev.
Any suggestions would be greatly appreciated..
You can debug design mode:
devenv.exe.You may find more detailed information on the 'net, by Googling for 'debug design mode'.