title: WPF DataGrid RowDetailsTemplate change the background color (Not rows or columns)
body: <p>I have a RowDetailsTemplate which binds and works well. </p>
  
  <p>But now I want to style in the background of the second DataGrid to show to the user that they are in the next band more clearly. </p>
  
  <p>So I am looking for something like</p>
  
  <pre><code>   &lt;DataGrid.RowDetailsTemplate&gt;
          &lt;DataTemplate&gt;
               &lt;Style TargetType="{x:Type DataGridRow}"...
                ...
  </code></pre>
  
  <p>However, looking around I can only see DataGridRow, columns etc, but looking to style the surrounding area of this grid, is this possible to style?</p>
  
  <p>Cheers</p>