title: Button Content Margin
body: <p>I can't work out how to get rid of the margin around a button's content. Here is some example XAML:</p>
  
  <pre><code>&lt;Button Background="Red" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch"&gt;
      &lt;Grid Background="Blue" Margin="0"&gt;
          &lt;TextBlock Text="me" Padding="0"&gt;&lt;/TextBlock&gt;
      &lt;/Grid&gt;
  &lt;/Button&gt;
  </code></pre>
  
  <p>I can't seem to get rid of the red bit. Has anyone got any ideas?</p>