title: ASP.NET MVC - FormsAuthentication.SetAuthCookie() and RolesIsUserInRole - wierd behavior
body: <p>I have something like this:</p>
  
  <pre><code>FormsAuthentication.SetAuthCookie(user, false);
  var tmp = Roles.IsUserInRole("administrator");
  var _tmp = Roles.IsUserInRole(user, "administrator");
  </code></pre>
  
  <p><code>tmp</code> is always false, and <code>_tmp</code> is always true. Why is <code>tmp</code> false?</p>