title: Should I use AsyncController at ASP.NET MVC 4?
body: <p>This class has this description:</p>
  
  <pre><code>Provided for backward compatibility with ASP.NET MVC 3.
  </code></pre>
  
  <p>And the source is just:</p>
  
  <pre><code>public abstract class AsyncController : Controller
  {
  }
  </code></pre>
  
  <p>I can´t find any documentation about deprecation of this class at MSDN. Should I replace uses of AsyncController to Controller?</p>