private void ShowPanoMono(object sender, EventArgs e)
        {
            var panoPage = new PanoPage();

            panoPage.Panorama.ImageSource = ImageSource.FromFile("test_2k_mono.jpg");
            panoPage.Panorama.SourceType  = VrSourceType.Mono;
            Navigation.PushAsync(panoPage);
        }
        private void ShowPanoUrl(object sender, EventArgs e)
        {
            var panoPage = new PanoPage();
            var imageUri = new Uri("https://infosky.ch/media/road.jpg");

            panoPage.Panorama.ImageSource = ImageSource.FromUri(imageUri);
            panoPage.Panorama.SourceType  = VrSourceType.StereoOverUnder;
            Navigation.PushAsync(panoPage);
        }