title: Setting a property of a style's ControlTemplate in XAML
body: <p>I want to access a property nested inside a style's control template. I know that you can do this in the code-behind:</p>
  
  <pre><code>GradientStop stop = (GradientStop)progressBar1.Template.FindName("gradStop", progressBar1);
  stop.Color = Colors.Black;
  </code></pre>
  
  <p>Is it possible to do the same, but in the XAML? For example:</p>
  
  <pre><code>&lt;ProgressBar Style="{StaticResource CustomProgressBar}" [???].Color="FF000000"/&gt;
  </code></pre>