title: DistinctBy not recognized as method
body: <p>Maybe i missing using ? (i have using System.Li).
  with <code>Distinct</code> no problem.</p>
  
  <p>This is my command that i want to add DistinctBy </p>
  
  <pre><code> List&lt;Capture&gt; list = db.MyObject.Where(x =&gt; x.prop == "Name").ToList();
  </code></pre>