title: JsonConvert Items by specific field
body: <p>I want to convert <a href="https://github.com/HackerNews/API" rel="nofollow noreferrer">HackerNews API Items</a> with Newtonsoft.</p>
  
  <p>I would like to look only at the type field and then convert to the right item of the type, so I don't have all fields in all items.</p>
  
  <p>I want to be able to determine the class by type and then deserialize.</p>