Visual Studio 2015 locks DLL during debugging

Question

I have 3 C# projects A, B, and C. Both A and B reference C. The references to C from A and B are set to \"Copy Local\" implying that after C is built to C.dll (in the output dir

Answer 1

in my case this was "Panda free Antivirus" Who was watching on the dll of the "C" project and this caused the error: "the process cannot access the file because it is being used by another process"