title: How to open two Solution in one Visual Studio IDE?
body: <p>I am working on two different solutions, say, <code>Solution1</code> and <code>Solution2</code>. As these two solutions are dependent upon each other, I have to open two separate Visual Studio while developing.</p>
  <p>It is really difficult to switch between these Visual Studio. I can't merge these two solutions into one as <code>Solution1</code> is being used by other projects and all are part of Source Control.</p>
  <p>Just wondering, can I open both solutions in the same Visual Studio IDE? I searched a lot but no luck. Any suggestions on existing VS AddIn or how to develop it would also be helpful.</p>
  <ul>
  <li>Visual Studio version - 2012 Ultimate</li>
  <li>Source Control - TFS</li>
  </ul>