What is disabling my edit-and-continue in vb10 vs2010?

Question

I've been using the vs2010 beta but I can't seem to get edit and continue to work.

• Compile -> Advanced Options -> Target platform is set to x86 (Compile -> Platform is disabled and set to Active (Any Cpu)?).
• Options -> Debugging -> Edit-and-continue is checked but grayed out. Presumably for the same reason I can't debug.
• Options -> Historical Debugging is set to Events Only. Disabling it doesn't help.
• I get no warnings when trying to modify files while debugging, they're just read-only (shows a lock icon in tab).

What are some other options that might be disabling edit-and-continue?

Answer 1

I've got the same thing under VS2010 - think it's a bug in VS when targeting anything other than framework 4.0 see here