title: OnActionExecuting(FilterExecutingContext) doesn't exist in System.Web.Mvc anymore?
body: <p>In preview 5 I was overriding the OnActionExecuting in my custom controller class, but now for some reason in beta it is giving me an error saying the parameter FilterExecutingContext doesn't exist?</p>
  
  <pre><code>     protected override void OnActionExecuting(System.Web.Mvc.FilterExecutingContext filterContext)
  </code></pre>
  
  <p>What is the parameter now?</p>