title: VS 2012 solution and projects - incompatible with VS 2010?
body: <p>I was under the assumption the solutions and / or C# projects created in VS 2012 could also be opened in VS 2010 (with SP1 applied).</p>
  
  <p>But I wasn't able to do so - VS 2010 didn't want to load the solution file, and after I manually "tweaked" it, now it complains about the <code>*.csproj</code> project file being <em>incompatible</em> with this current version of VS 2010 .....</p>
  
  <p>What am I missing?</p>