title: VS project unload and reload
body: <p>My solution is way too big, and when I work on a specific feature, I am unloading un-needed projects to speed up the compilation process.
  However, when I need to reload everything back in the solution, it literally takes ages. I once waited around 2 hours for it. I think that was for about 40 projects. Why does it take that long? Is there a simple workaround of closing the solution, editing something in the .sou file, and then opening it again with all projects loaded? It just drives me nuts at the moment!</p>