title: Type or namespace ActionExecutingContext or ActionFilterAttribute
body: <p>Hello Suddenly my mvc application started giving exceptions :</p>
  
  <pre><code>rror    36  The type or namespace name 'ActionExecutingContext' could not be found (are you missing a using directive or an assembly reference?)    C:\Users\TMM\Desktop\04.09\BEAWEB_WITH_LANG - Copy\MvcBeaWeb\MvcBeaWeb\Filters\InitializeSimpleMembershipAttribute.cs   18  48  MvcBeaWeb
  Error   22  The type or namespace name 'ActionFilterAttribute' could not be found (are you missing a using directive or an assembly reference?) C:\Users\TMM\Desktop\04.09\BEAWEB_WITH_LANG - Copy\MvcBeaWeb\MvcBeaWeb\Filters\NoCacheAttribute.cs  9   36  MvcBeaWeb
  Error   30  The type or namespace name 'ActionFilterAttribute' could not be found (are you missing a using directive or an assembly reference?) C:\Users\TMM\Desktop\04.09\BEAWEB_WITH_LANG - Copy\MvcBeaWeb\MvcBeaWeb\Filters\InitializeSimpleMembershipAttribute.cs   12  63  MvcBeaWeb
  Error   39  The type or namespace name 'ActionResult' could not be found (are you missing a using directive or an assembly reference?)  C:\Users\TMM\Desktop\04.09\BEAWEB_WITH_LANG - Copy\MvcBeaWeb\MvcBeaWeb\Controllers\AccountsController.cs    24  16  MvcBeaWeb
  </code></pre>
  
  <p>I even re installed visual studio 2012! </p>
  
  <p>Best Regards,</p>