title: Visual Studio project not working in Blend (reference errors)
body: <p>When I open my project that uses a <code>MahApps.Metro</code> window in "Blend for Visual Studio" I get tons of errors. One of them is (this one probably causes all the other errors): </p>
  
  <pre><code>The name "MetroWindow" does not exist in the namespace "clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
  </code></pre>
  
  <p>This same project works fine in Visual Studio 2012. Additionally, all resources in Blend have a warning icon. How could I fix this?</p>
  
  <p>Any help would be appreciated.</p>