public void Show()
        {
            //var context = Android.App.Application.Context;
            Android.Gms.Ads.InterstitialAd ad = new Android.Gms.Ads.InterstitialAd(context);
            ad.AdUnitId = "ca-app-pub-4681470946279796/3704231820";

            _ad = ad;
            OnAdLoaded();
            ad.AdListener = this;

            var requestbuilder = new AdRequest.Builder();

            ad.LoadAd(requestbuilder.Build());
        }
        public void show()
        {
            var context = Application.Context;

            _ad          = new InterstitialAd(context);
            _ad.AdUnitId = "ca-app-pub-9122365822495930/4770566486"; // Bloc d'annonce INTERSTITIEL !

            var intlistener = new InterstitialAdListener(_ad);

            _ad.AdListener = intlistener;
            intlistener.OnAdLoaded();

            var requestbuilder = new AdRequest.Builder();

            _ad.LoadAd(requestbuilder.Build());
        }
        public Task LoadAd()
        {
            return(Thread.UI.Run(() =>
            {
                if (string.IsNullOrEmpty(UnitId))
                {
                    OnAdFailed.Raise("The UnitId of the Interstitial ad has not specified!");
                    return;
                }

                interstitialAd = new Ads.InterstitialAd(UIRuntime.CurrentActivity);
                interstitialAd.AdUnitId = UnitId;
                interstitialAd.AdListener = new AndroidAdListener(this);
                interstitialAd.LoadAd(new Ads.AdRequest.Builder().Build());
            }));
        }