title: Using MSpec runner in Visual Studio 2010 and .NET 4
body: <p>I'm a big fan of MSpec so naturally I wanted to use is right away with VS2010 as well. I have the MSpec runner defined as an external tool in Visual Studio to be able to have it always visible as a toolbar item.</p>
  
  <p>Anyway, whenever I try to use the MSpec runner (mspec.exe) with a .NET 4.0 solution I get the following error:</p>
  
  <blockquote>
    <p><code>Could not load file or assembly 
    'file:///C:\Users\[SOMEUSER]\[SOME_FOLDERS]\bin\Debug\[PROJECT].Specs.dll' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.</code></p>
  </blockquote>
  
  <p>I can still run my specs with the Resharper 5 runner so it's no big drama, but I bothers me to no end :þ</p>
  
  <p>Do you guys have any idea what the problem could be? Is there any solution other than recompiling the whole Mspec source code as a .NET 4.0 solution, which I really, really don't want to do?</p>
  
  <p>Thanks in advance.<br/>
  Sergi</p>