title: Visual Studio Intellisense not working on XAML only on very specific circumstances
body: <p>I'm making a new <code>UserControl</code>, and when I opened it the XAML was not working. </p>
  
  <p>I thought that this was odd, as when I was working on my MainWindow it was working just fine. So I checked on my MainWindow. It still works there. Also in C# code. </p>
  
  <p>However, if I press <kbd>CTRL</kbd> + <kbd>&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;</kbd> it still comes up fine. </p>
  
  <p>I'm not quite sure why. I went to Tools➾Options➾Text Editor➾XAML➾General, and the Text Completion section is greyed out (e.g. Auto-List Members, etc.). This is also greyed out when I see it on my main window, but Intellisense works there. </p>
  
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  <p>Could someone help me? My VS version is VS2012 Express, Update 2. The only extension installed is XNA (using <a href="https://stackoverflow.com/questions/10881005/how-to-install-xna-game-studio-on-visual-studio-2012">this</a> "hack").</p>