Visual Studio : Could not write lines to file xxx Access to the path yyy is denied

Using Visual Studio 2012, checked a project into TFS and got the above error.

WTF?

Mr. Google to the rescue and the majority view was either:

• Make the file readable i.e. no readonly
• Delete the /bin and /obj directories and rebuild

The file was R/W already so went for option 2 and the error disappeared.

All good!

Enjoy!