MVC front and back shows different 404 error pages

Recently done system front end is mobile, backend is PC side, and then 404 page can not use one, so find some information, find a solution

Under the Global.asax folder, add the Application_EndRequest event handler with the following code:

protected voidapplication_endrequest () {varStatusCode =Context.Response.StatusCode; varRoutingdata =Context.Request.RequestContext.RouteData; if(StatusCode = =404|| StatusCode = = -) {response.clear (); varArea = routingdata.datatokens[" Area"]; if(area!=NULL&&area. ToString () = ="Admin") {Response.Redirect ("/admin/error/error404");//back-end 404 page                }                Else{Response.Redirect ("/error/error404");//Front 404 Page                }            }        }

MVC front and back shows different 404 error pages