async void ViewSource_Clicked(object sender, System.EventArgs e)
 {
     await Navigation.PushAsync(new ViewSourcePage
     {
         Source = XamlUtil.GetXamlForType(typeof(ThreeTwoPage))
     });
 }
 private async void ViewXAML()
 {
     var source = XamlUtil.GetXamlForType(typeof(ControlPage));
     await Shell.Current.Navigation.PushAsync(new ViewSourcePage
     {
         Source = source
     });
 }
        async void ViewSource_Clicked(object sender, System.EventArgs e)
        {
            await Navigation.PushAsync(new ViewSourcePage
            {
                Source = XamlUtil.GetXamlForType(typeof(ThreeOnePage))
            });

            //var choice = await DisplayActionSheet("Actions", "Close", "destroy",
            //"Release Notes",
            //"View XAML Source",
            //"Documentation");
        }