title: Progress bar visibility after picture is saved
body: <p>I am able to show the progress indicator while saving am image to media library but I don't know how to change the <code>IsVisible = false</code> after the pictures saved. Following is the code I used for it - </p>
  
  <pre><code>async void Save_Click(object sender, EventArgs e)
      {
          ProgressIndicator progress = new ProgressIndicator();
          progress.IsVisible = true;
          progress.IsIndeterminate = true;
          progress.Text = "saving image...";
  
          //Save a copy of the image
          using (MediaLibrary library = new MediaLibrary())
          {
              var imgStream = (await App.CurrPhoto.RawSession.RenderToJpegAsync()).AsStream();
              library.SavePicture(DateTime.UtcNow.Ticks.ToString(), imgStream);
          }
  
          SystemTray.SetProgressIndicator(this, progress);
      }
  </code></pre>