title: To run this application, you first must install .Net 4.5
body: <p>I have a wpf project that I created in VS2012, but am now trying to hack in VS2010.</p>
  
  <p>In the csproj file I removed the 'required version' stuff. I can open the project in VS2010, I can compile it too, but if I try to run it, I get the 'needs v4.5' message.</p>
  
  <p>I tried removing all the references and adding them back in again: still compiles (so all the dependencies should be on my (XP) machine).</p>
  
  <p>Where else should I be looking?</p>