title: How to split a Grid row into two columns?
body: <p>I have the Grid layout with 3 rows.How do i split the 3rd row into 2 columns.</p>
  
  <pre><code>&lt;Grid.RowDefinitions&gt;
      &lt;RowDefinition Height="0.75*"/&gt;
      &lt;RowDefinition Height="0.25*"/&gt;
      &lt;RowDefinition Height="36"/&gt;
  &lt;/Grid.RowDefinitions&gt;
  </code></pre>