title: Setting the HyperlinkButton.NavigateUri Property with Resource and static text
body: <p>iam trying to populate the HyperlinkButton.NavigateUri Property with a string from the properties...
  But i would like also to append some additional text to the string saved in the app property.</p>
  
  <p>here is what i have:
  in the application property under the name Email i saved the following information:
  admin@testdomain.com</p>
  
  <p>in window.xaml i have:</p>
  
  <pre><code>&lt;TextBlock&gt;
  &lt;Hyperlink NavigateUri="mailto:{Binding Source={x:Static my:Settings.Default}, Path=Email}?subject=Email From My App" RequestNavigate="Hyperlink_RequestNavigate"&gt;
  &lt;Run Text="Email ME!"/&gt;
  &lt;/Hyperlink&gt;
  &lt;/TextBlock&gt;
  </code></pre>
  
  <p>Problem is:</p>
  
  <p>mailto:{Binding Source={x:Static my:Settings.Default}, Path=Email}?subject=Email From My App"</p>
  
  <p>How would i just join the string to be a valid NavigateUri Property ?</p>
  
  <p>Thanks in advance</p>