title: What is difference between " * " and "Auto" in Silverlight Grid Layout Definitions
body: <p>trying to understand the following:</p>
  
  <pre><code>&lt;Grid Name="Root"&gt;
      &lt;Grid.RowDefinitions&gt;
          &lt;RowDefinition Height="*" /&gt;
          &lt;RowDefinition Height="*" /&gt;
          &lt;RowDefinition Height="Auto" /&gt;
      &lt;/Grid.RowDefinitions&gt;
      &lt;Grid.ColumnDefinitions&gt;
          &lt;ColumnDefinition Width="Auto" /&gt;
          &lt;ColumnDefinition Width="*" /&gt;
          &lt;ColumnDefinition Width="Auto" /&gt;
      &lt;/Grid.ColumnDefinitions&gt;
  &lt;/Grid&gt;
  </code></pre>
  
  <p>Can anyone help me in explaining the difference between * and Auto in the above snippet?</p>
  
  <p>thanks</p>