title: MVC4 enum and radio button list
body: <p>I have seen a few threads on this but none seem to apply to MVC4 because the RadioButtonFor html extension method/helper does not exist.</p>
  
  <p>Say I have an enum list - i.e Airlines:</p>
  
  <pre><code>public enum Airlines
  {
     Unknown = 0,
     BritishAirways = 1,
     VirginAtlantic = 2,
     AirFrance = 3
  }
  </code></pre>
  
  <p>How can I bind this to a Radio button list on my view and be able to retrieve the selected item?
  What about being able to say "select one item" if there is no selection made? </p>