public Task LoadRewardedVideo() { return(Thread.UI.Run(() => { if (UnitId.IsEmpty()) { OnAdFailed.Raise("The UnitId of the RewardedVideoView has not specified!"); return; } NativeView = new RewardedAd(UIRuntime.CurrentActivity, UnitId); NativeView.LoadAd(new Android.Gms.Ads.AdRequest.Builder().Build(), new AdmobRewardedAdLoadCallback(this)); })); }