title: Xamarin Studio iOS assembly error
body: <p>After I updated my Xamarin Studio (iOS) it gives me this error when trying to build/debug.</p>
  
  <p>I ain't got no clue how to fix this, would appreciate some help</p>
  
  <p>Error:</p>
  
  <pre><code>The type 'MonoTouch.UIKit.UIView' is defined in an assembly that is not referenced. 
  Consider adding a reference to assembly 'monotouch, Version=0.0.0.0, 
  Culture=neutral, PublicKeyToken=null'
  </code></pre>
  
  <p>I am using "AlexTouch.MBProgressHUD.dll" and I have added it to my usings.</p>