public override void DidFailToReceiveAd(GoogleAdMobAds.GADBannerView view, GoogleAdMobAds.GADRequestError error)
            {
                EventHandler <GADBannerViewErrorEventArgs> handler = didFailToReceiveAd;

                if (handler != null)
                {
                    var args = new GADBannerViewErrorEventArgs(error);
                    handler(view, args);
                }
            }
			public override void DidFailToReceiveAd (GoogleAdMobAds.GADBannerView view, GoogleAdMobAds.GADRequestError error)
			{
				EventHandler<GADBannerViewErrorEventArgs> handler = didFailToReceiveAd;
				if (handler != null){
					var args = new GADBannerViewErrorEventArgs (error);
					handler (view, args);
				}
			}