title: Converter returning Segoe MDL2 icon after binding does not work
body: <p>I'm trying to bind the PlayerFramework.MediaPlayer.CanPause Property to a Button in my windows 10 universal app. This works using the default font, but when I switch to Segoe MDL2 to get those fancy icons the button shows garbage.</p>
  
  <pre><code>&lt;mmppf:MediaPlayer x:Name="mediaElement"&gt;
  
  ...
  
  &lt;Button Name="btnPlay" 
          Style="{StaticResource transportStyle}"  Content="{Binding CanPause, ElementName=mediaElement, Converter={StaticResource CanPauseToPlayPauseConverter}}"/&gt;
  </code></pre>
  
  <p>This is from the converter:</p>
  
  <pre><code>public object Convert(object value, Type targetType, object parameter, string language)
      {
          bool canPause = (bool)value;
          if (canPause)
              return @"&amp;#xE769;";
          // "play"
          return "&amp;#xE102;";
      }
  </code></pre>
  
  <p>...and this from the button style:</p>
  
  <pre><code>&lt;Style x:Name="transportStyle"  TargetType="Button"&gt;
         &lt;!-- &lt;Setter Property="FontFamily" Value="Segoe MDL2 Assets" /&gt;--&gt;
  &lt;/Style&gt;
  </code></pre>
  
  <p>After disabling the Setter property the button shows the expected value       </p>
  
  <pre><code>&amp;#xE102;
  </code></pre>
  
  <p>which, directly set as the button content, shows the play symbol.</p>
  
  <p>Any ideas why this doesn't work? </p>
  
  <p>edit: Copying the character from the character table and returning it does work.</p>