When debugging ASP.NET MVC app, breakpoints are not hit

Question

When trying to debug a ASP.NET MVC app, the breakpoints in my controllers arent getting hit. When entering debug mode they just show an empty red circle with a warning trian

Answer 1

None of these answers helped me. Some of my breakpoints were hit, and some not. But I discovered the problem in my case.

If there is a file at the exact same virtual location with the exact same name as the URL you are trying to debug, the file will be served to the browser automatically by IIS and the breakpoint will not be hit because no MVC code actually runs.