title: Get distinct parameters from a List
body: <p>I have a <code>CarData</code> object with the following properties:<br>
  <code>PrimaryKey</code> <code>Make</code> <code>Model</code> <code>Year</code> <code>Drivetrain</code> <code>Country</code></p>
  
  <p>I have about 1000 of these <code>CarData</code> objects in a List :<br>
  <code>List&lt;CarData&gt; CarObjects</code></p>
  
  <p>Is there a simple way to get a list of the distinct <code>Make</code>s?</p>