title: Finding items of a list that are not in the other list
body: <p>My object is like</p>
  
  <pre><code>class MyObject
  {
  string FirstName, string LastName, string Phone
  }
  </code></pre>
  
  <p>and I have two list of this object:</p>
  
  <pre><code>incomingList&lt;MyObject&gt;
  fullList&lt;MyObject&gt;
  </code></pre>
  
  <p>How can I have a list of the things that are in the <code>incomingList</code> but are not in the <code>fullList</code></p>