protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.activity_rewarded_ad);

            progress = FindViewById <ProgressBar>(Resource.Id.progress);

            // Construct optional app options object to be sent with configure
            AdColonyAppOptions appOptions = new AdColonyAppOptions()
                                            .SetUserID("unique_user_id")
                                            .SetKeepScreenOn(true);

            // Configure AdColony in your launching Activity's onCreate() method so that cached ads can
            // be available as soon as possible.
            AdColony.Configure(this, appOptions, APP_ID, ZONE_ID);

            // Optional user metadata sent with the ad options in each request
            AdColonyUserMetadata metadata = new AdColonyUserMetadata()
                                            .SetUserAge(26)
                                            .SetUserEducation(AdColonyUserMetadata.UserEducationBachelorsDegree)
                                            .SetUserGender(AdColonyUserMetadata.UserMale);

            // Ad specific options to be sent with request
            adOptions = new AdColonyAdOptions()
                        .EnableConfirmationDialog(true)
                        .EnableResultsDialog(true)
                        .SetUserMetadata(metadata);

            // Create and set a reward listener
            AdColony.SetRewardListener(this);

            // Set up listener for interstitial ad callbacks. You only need to implement the callbacks
            // that you care about. The only required callback is onRequestFilled, as this is the only
            // way to get an ad object.
            listener = new MyAdColonyInterstitialListener(this);

            // Set up button to show an ad when clicked
            showButton        = FindViewById <Button>(Resource.Id.showbutton);
            showButton.Click += ShowButton_Click;

            // GDPR
            AdColony.AppOptions.SetGDPRConsentString("0");
            AdColony.AppOptions.SetGDPRRequired(false);
        }