I have a Visual Studio solution with four C# projects in it. I want to step into the code of a supporting project in the solution from my main project, but when I use the \"
A couple of possibilities:
There is a check box to step into "just my code". Its intent is to make it so you can't step into Microsoft's Framework code (unless you choose to by unchecking the box).
You might try recompiling the supporting code to make sure the code you're debugging exactly matches the code file you're looking at. VS does care about this and will disable a breakpoint if you put it in the code file whose version doesn't match. Also, make sure the PDB file is in the same directory as the DLL.