title: The parameters dictionary contains a null entry for parameter 'testId' of non-nullable type 'System.Int32'
body: <p>I'm trying to call an action in my controller:</p>
  
  <p>using this url:
  <code>http://localhost:5345/ManageTest/Details/5</code></p>
  
  <pre><code>[Authorize]
  public class ManageTestController : Controller
  {
  
  public ActionResult Details(int testId)
      {
  </code></pre>
  
  <p>The parameters dictionary contains a null entry for parameter 'testId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Details(Int32)' in 'MAMAdmin.Controllers.ManageTestController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
  Parameter name: parameters</p>