Jun 04, 2013 06:49 PM|Rion Williams|LINK
You may want to consider restarting the hosting environment (IIS?) and check the Task Manager to ensure that there aren't any other processes running that could be using up all of your resources (or at least enough to prevent the application
in question from running). You might also want to take a look at
this Stack Overflow thread, which discusses several other things that could cause something like this (such as too few available threads, etc.).
I've seen several solutions that recommend reinstalling Visual Studio (however I would strongly consider trying to find another less-envasive solution before taking this route).
You may want to check and make sure that you have all of the latest updates for .NET and Visual Studio as well.