title: How to structure a delegate that points to an extension method
body: <p>I have a LINQ query, and I want to have a delegate that I can assign the "OrderBy" or "OrderByDescending"  methods to.  The signature of the "<a href="http://msdn.microsoft.com/en-us/library/bb534966.aspx" rel="nofollow noreferrer">OrderBy</a>" extension method is:</p>
  
  <pre><code>public static IOrderedEnumerable&lt;TSource&gt; OrderBy&lt;TSource, TKey&gt;(
      this IEnumerable&lt;TSource&gt; source,
      Func&lt;TSource, TKey&gt; keySelector)
  </code></pre>
  
  <p>Can anyone show me what the delegate would look like?</p>