Urban Airship setup for Xamarin.iOS.

AppDelegate.cs

public override bool FinishedLaunching (UIApplication app, NSDictionary options)
            {
                window = new UIWindow (UIScreen.MainScreen.Bounds);

                viewController = new UrbanAirshipTestViewController ();
                window.RootViewController = viewController;
                window.MakeKeyAndVisible ();

                UAPush.Shared.RegisterForRemoteNotificationTypes(UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound);

                var takeOffOptions = new NSMutableDictionary ();
                options = new NSDictionary ();
                takeOffOptions.SetValueForKey (options, new NSString ("UAirshipTakeOffOptionsLaunchOptionsKey"));

                UAPush.Shared.ResetBadge ();
                UAirship.TakeOff (takeOffOptions);

                return true;
            }

            public override void ReceivedRemoteNotification (UIApplication application, NSDictionary userInfo)
            {
                var message = (NSString) userInfo.ObjectForKey (new NSString ("aps")).ValueForKey(new NSString("alert"));

                var alert = new UIAlertView("Notification", message, null, "Okay", null);
                alert.Show ();
            }

            public override void WillTerminate (UIApplication application)
            {
                UAirship.Land ();
            }

            public override void RegisteredForRemoteNotifications (UIApplication application, NSData deviceToken)
            {
                UAPush.Shared.RegisterDeviceToken (deviceToken);
            }