title: Load external font and use it in C#
body: <p>I'd like to load a font from an external server and once is loaded (I guess that's necessary) use it to create a few textfields.</p>
  
  <p>I'm trying:</p>
  
  <pre><code>font_uri = new Uri("http://localhost/assets/fonts/wingding.ttf");
  bf_helvetica = new FontFamily(font_uri, "bf_helvetica");
  
  TextBlock test_tb = new TextBlock();
  test_tb.Text = "This is a test";
  test_tb.FontSize = 16;
  test_tb.Foreground = Brushes.Red;
  test_tb.FontFamily = bf_helvetica;
  stage.Children.Add(test_tb);
  </code></pre>
  
  <p>But it creates the textblock with the default font.
  Any ideas?</p>
  
  <p>Thanks in advance :)</p>