Visual Studio 2013 was acting up - it would take > 20 minutes to compile.
I decided to try and help myself by deleting the SUO file thinking that may be a good first step.
Here is the thing, when I delete the file VS hangs at "loading solution". Put it back - at least the project opens (but still takes forever to compile).
From all I know this file should just regenerate - what gives?
Try to disable your network adapter. In some cases the issue comes from vs2013 trying to connect with your Microsoft username on load.
I hope it address your issue.