ASP.NET MVC4 routing issue with cache,manifest file

[wubaz]

I want to generate cache.manifest file automatically. Therefore I created a controller and an action accessible by /OfflineSupport/Manifest. Everything works fine. The content is delivered correctly.Now I want to register this action when I call cache.manifest. That's why I added a new route. My RegisterRoutes method looks as follows:\[code\]public static void RegisterRoutes(RouteCollection routes){ routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.MapRoute( name: "Default", url: "{controller}/{action}/{id}", defaults: new {controller = "Home", action = "Index", id = UrlParameter.Optional} ); routes.MapRoute("cache.manifest", "cache.manifest", new { controller = "OfflineSupport", action = "Manifest" });}\[/code\]My site runs under localhost:7365/. When I call localhost:7365/cache.manifest, I get a 404.0 with following detailed information:module: IIS Web Core, message: MapRequestHandler, handler: StaticFile, errorcode: 0x80070002.And the action is never called. Any suggestions what to change to get correct routing?