title: Visual Studio Intellisense not showing some classes
body: <p>My Visual Studio is not showing a lot of the available classes in the IntelliSense auto-complete. For example, a project I'm working on has a reference to the <code>Microsoft.Xna.Framework</code> namespace, yet even after adding the using statement using <code>Microsoft.Xna.Framework</code> in a file, IntelliSense is unable to recognize classes like <code>Texture2D</code> and <code>Rectangle</code>. I can still type them in, however, without getting a compiler error. Any idea what's happening?</p>
  
  <p>The IntelliSense detects standard libraries like <code>System.Diagnostics</code> but not any external ones.</p>
  
  <p>It is not a NameSpace conflict issue because classes within the current namespace are also missing from the IntelliSense.</p>
  
  <p>I have tried:</p>
  
  <ul>
  <li>Restarting Visual Studio (With and without closing tabs)</li>
  <li>Deleting the contents of <code>%LocalAppData%\Microsoft\VisualStudio\14.0\ComponentCacheModel folder</code></li>
  <li>Resetting import and export settings</li>
  </ul>