Exception System.Web.HttpException (0x80004005): Server Cannot set status after HTTP headers has been sent.

In using MVC's Authorizeattribute for authentication, overriding the Handleunauthorizedrequest method, there is an exception System.Web.HttpException in the Application_Error method ( 0x80004005): Server Cannot set status after HTTP headers has been sent.

Repeated attempts to discover this line of code in the protected override void Handleunauthorizedrequest (AuthorizationContext filtercontext) method are caused by the " Base.handleunauthorizedrequest (Filtercontext) ". Delete the code and find that the other methods in the action are executed before the jump.

Instead: Filtercontext.result = new Redirectresult (Common.gomelongingurl);

Everything is fine.