.</summary>        <returns>A reference to the mapped route.</returns>        <param name="routes">A collection of routes for the application.</param>        <param name="name">The name of the route to map.</param>        <param name="routeTemplate">The route template for the route.</param>        <param name="defaults">An object that contains default route values.</param>        <param name="constraints">A set of expressions that specify values for routeTemplate.</param>      </member>      <member name="M:System.Web.Http.RouteCollectionExtensions.MapHttpRoute(System.Web.Routing.RouteCollection,System.String,System.String,System.Object,System.Object