protected override void OnElementChanged(ElementChangedEventArgs <WebView> e)
        {
            base.OnElementChanged(e);

            if (e.NewElement != null)
            {
                _extendedWebView = e.NewElement as ExtendedWebView;

                if (_extendedWebView.IsTransparent)
                {
                    this.Control.SetBackgroundColor(Android.Graphics.Color.Transparent);
                }
            }
        }
        protected override void OnElementChanged(VisualElementChangedEventArgs e)
        {
            base.OnElementChanged(e);

            if (e.NewElement != null)
            {
                _extendedWebView = e.NewElement as ExtendedWebView;

                if (_extendedWebView.IsTransparent)
                {
                    BackgroundColor = UIColor.Clear;
                    Opaque          = false;
                }
            }
        }