FIXED: IIS Express The Process Cannot Access the File ...
https://www.codelocker.net/p/17504.02.2015 · This might be the case for you but it wasn't for me. What ended up being the culprit for me was Google Chrome. I was developing a website that was using the IIS Express port 49215. It is important that this project always uses this port because I use Facebook Connect to login and my test FB App uses localhost:49215 to ensure requests are valid.