private async void SalvarQr(object sender, EventArgs e) { if (await Permisos.EnsurePermission <Permissions.StorageWrite>("Permita el acceso") == PermissionStatus.Granted) { ScreenshotResult screenshot = await Screenshot.CaptureAsync(); using (Stream stream = await screenshot.OpenReadAsync()) { string app_name = Application.Current.GetType().Namespace; await DependencyService.Get <IGalleryService>() .SaveImageToGallery(stream, $"{TxtTitle.Text}_{Guid.NewGuid():N}.png", app_name); } Acr.UserDialogs.UserDialogs.Instance.Alert("La cadena ha sido salvada en su galeria"); } }