https://learn.microsoft.com/en-us/dotnet/api/system.web.mvc.routecollectionattributeroutingextensions.mapmvcattributeroutes?view=aspnet-mvc-5.2&redirectedfrom=MSDN
RouteCollectionAttributeRoutingExtensions.MapMvcAttributeRoutes Method (System.Web.Mvc) | Microsoft...
Maps the attribute-defined routes for the application.
system webmethodmvcmicrosoft