private async void AppbarCameraShared_Tapped(object sender, TappedRoutedEventArgs e) { if (this.progressRing.IsActive) { return; } if (this.targetBitMap != null) { var byteImage = await this.targetBitMap.GetPhotoBytesAsync(); InMemoryRandomAccessStream randomStream = new InMemoryRandomAccessStream(); var stream = randomStream.AsStreamForWrite(); await stream.WriteAsync(byteImage, 0, byteImage.Length); await stream.FlushAsync(); if (stream.Length > 0) { randomStream.RegisterForShare("Photo File", "This is Photo File"); } } }