Change orientation automatically with iOS6 and MonoTouch

Orientation and auto rotation in iOS6 with MonoTouch is slightly less obvious then I had hoped. It took me a little while to get it right, so maybe this will help others. To get your app to auto-rotate you will need to make sure you have done the following:

1. Edited your Info.plist to specify allowed orientations
   
2. Make sure you have RootController assigned to your view. Without this auto rotation will not work and you will get a compile time warning - "Application windows are expected to have a root view controller at the end of application launch". 

Do the following in AppDeligate.cs

UIWindow window;

public override bool FinishedLaunching (UIApplication app, 
                                           NSDictionary options)
{
     window = new UIWindow (UIScreen.MainScreen.Bounds);
     
     // change this to your controller
     var cvc = new SomeViewController(); 
     window.RootViewController = cvc; 
   
     // make the window visible
     window.MakeKeyAndVisible ();

     return true;
}

Once you are done with this, you should get auto-rotation!

Next, you can specify allowed orientations (if you want to limit to a specific set) either in AppDeligate.cs (globally) or in your controller level using the following override:

public override UIInterfaceOrientationMask 
                  GetSupportedInterfaceOrientations 
                     (UIApplication application, UIWindow forWindow)
{
  return UIInterfaceOrientationMask.Landscape;
}

Also, on the controller level, you can disable auto rotation all together using the following:

public override bool ShouldAutorotate()
{
         return false;
}

Hope this helps! Leave me a comment if this worked for you.