void onAdLoaded(AndroidJavaObject ad)
 {
     this.rewardedVideoAd.executeOnMainThread(() => {
         if (rewardedVideoAd.RewardedVideoAdDidLoad != null)
         {
             rewardedVideoAd.RewardedVideoAdDidLoad();
         }
     });
 }
 private void onAdLoaded(AndroidJavaObject ad)
 {
     rewardedVideoAd.executeOnMainThread(delegate
     {
         if (rewardedVideoAd.RewardedVideoAdDidLoad != null)
         {
             rewardedVideoAd.RewardedVideoAdDidLoad();
         }
     });
 }