title: How to Bind two DataGridColumns Widths in WPF?
body: <p>I'm aware of <code>DataGridColumns</code> not being on the logical nor visual tree of a grid. I'm using the proxy as shown <a href="http://tomlev2.wordpress.com/2011/03/21/wpf-how-to-bind-to-data-when-the-datacontext-is-not-inherited/" rel="nofollow">here</a>.</p>
  
  <p>I need to bind the width of some of the columns. I usually use bindings like this one:</p>
  
  <pre><code>Width="{Binding ActualWidth, ElementName=LastOperationColumn}
  </code></pre>
  
  <p>However, it is not working. Any idea on how to do this?</p>