Visual Studio 2010: Breakpoints don't work after rebuild

Question

I'm working on a VS2010 Solution containing an ASP.NET Website Project and 8 c# class libraries. All projects are set to compile under .NET 3.5

When I set a breakpoint somewhere in the class libraries, the debugger breaks correctly and everything is fine. If I then stop debugging, modify code in the class library, and start debugging again (which of course rebuilds the libraries which were modified) the debugger ignores the breakpoints.

Has anyone else experienced anything like this? I'm lost and it's extremely frustrating to not be able to debug after making even a single line change and rebuilding.

• Visual Studio 2010 Ultimate
• Windows 7 Professional 64-bit

Answer 1

Be sure that you are killing your webdev server instance. If the breakpoints that are not being hit are in server code a new debug instance won't automatically attach to it.