title: SetRequestedOrientation does not exist when upgrading to Mono for Android 4.2
body: <p>I just upgraded to Mono for Android version 4.2. Since then I am getting an error when trying to call <code>SetRequestedOrientation</code> from an Activity. Just get an error that says it does not exist in the current context. I was using v4.0 and this was working fine.</p>
  
  <p>Just wondering if anyone else is having this issue since upgrading or if you know of a fix. Thanks.</p>
  
  <p>This code used to work fine.</p>
  
  <pre><code>using System;
  
  using Android.App;
  using Android.Content.PM;
  using Android.OS;
  
  namespace AndroidApplication1
  {
      [Activity(Label = "AndroidApplication1")]
      public class Activity1 : Activity
      {
          protected override void OnCreate(Bundle bundle)
          {
              base.OnCreate(bundle);
  
              SetRequestedOrientation(ScreenOrientation.Portrait);
          }
      }
  }
  </code></pre>