title: Text over semi-transparent background
body: <p>This must be so simple but I can't do it: if I put a textblock in a container and make the container's opacity &lt; 1, the text inherits that opacity, no matter whether I try to override it in the textblock.  How can I keep the text 100% opacity while in a semii-transparent container?</p>
  
  <pre><code>&lt;Grid x:Name="LayoutRoot"&gt;
      &lt;Border Background="red" Opacity="0.5"&gt;
          &lt;TextBlock Text="TextBlok" Opacity="1"/&gt;
      &lt;/Border&gt;
  &lt;/Grid&gt;
  </code></pre>