title: Opening web.config file causes Visual Studio 2010 Ultimate to hang and crash
body: <p><strong>Situation: </strong> 
  I installed Visual Studio 2012 on top of my previous Visual Studio 2010 Ultimate. I uninstalled VS2012 shortly thereafter along with all SQL 2012 database junk and yadda yadda. Everything in VS 2010 seems to be good, but when I try to open my web.config file VS hangs indefinitely. </p>
  
  <p><strong>Tried:</strong></p>
  
  <p>(1) Downloading and replacing the dsref80.dll that gets overridden by VS2012</p>
  
  <p>(2) Uninstalled all VS extensions, including NuGet</p>
  
  <p>(3) Created new website and web.config file. Problem persists</p>
  
  <p><strong>Question:</strong> Does anyone have any other ideas about what could cause the web.config file to cause VS2010 to hang and crash after clicking on it? </p>