Visual Studio breakpoints break in the wrong source file (or multiple files simultaneously) if multiple files have the same name

Question

In a team project I\'m working on, setting a breakpoint in a file (say IdeasController.cs) will lead to erratic debugger behaviour if there\'s another file with

Answer 1

I was having the same issue. In my case both the projects had same port numbers. I was able to resolve it by changing the port number of the project whose file's breakpoints were not hitting.

My guess is that IIS Express was caching the pdb file from the second project since both files had the same name, and the projects had the same port number.