title: Could not load file or assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'
body: <p>After installing vs2012 and updating my vs2010 WPF project I get the following error in WPF designer:
  Could not load file or assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)   </p>
  
  <p>This happens for every xaml page in the project. </p>
  
  <pre><code>&lt;dx:DXWindow.DataContext&gt;
      &lt;vm:MyViewModel/&gt;
  &lt;/dx:DXWindow.DataContext&gt;
  </code></pre>
  
  <p>VS marks vm:MyViewModel as the problem line. If I comment it out the designer windows shows a blank page. This same projects works fine in VS2010. The target framework is set to 4 in both versions of visual studio.</p>