void InterstitialAdRewardedVideoAdFailedToLoad(object sender, Android.Gms.Ads.Reward.RewardedVideoAdFailedToLoadEventArgs e)
 {
     if (_currentLoadsCount < _loadPosibilityCount)
     {
         _currentLoadsCount++;
         _mInterstitialAd.LoadAd(new AdRequest.Builder().Build());
     }
     else
     {
         _completionSource.TrySetResult(false);
     }
 }
 private void InterstitialAd_RewardedVideoAdFailedToLoad(object sender, Android.Gms.Ads.Reward.RewardedVideoAdFailedToLoadEventArgs e)
 {
     _adsNotify.RewardedVideoAdFailedToLoad(e.ErrorCode);
 }