title: What does the ? mean after a type?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2069863/a-curious-c-syntax">a curious c# syntax</a>  </p>
  </blockquote>
  
  <p>So I've seen some code around and a few of them use a ? after the type, like this:</p>
  
  <pre><code>private Point? loc = null;
  </code></pre>
  
  <p>So I'm wondering if Point? is different than Point (can't put a question mark at the end of my sentence or I'll confuse you guys ... :] ). The language I'm using is C# by the way.</p>