Yet another one of these questions, but I could not find an answer to why I am getting this error in any of the others.

I have my routes set up as:

public class ContentRoutes { public static void Map(RouteCollection _routes) { _routes.MapHttpRoute( name: "GetThumbnail", routeTemplate: "api/content/thumbnail/{_id}", defaults: new { controller = "Content", id = "GetThumbnail" } ); _routes.MapHttpRoute( name: "GetFile", routeTemplate: "api/content/file/{_id}", defaults: new { controller = "Content", id = "GetFile" } ); } } 

Which I am trying to map to my controller methods, which are declared as:

[AcceptVerbs("GET")] public HttpResponseMessage GetThumbnail(int _id) [AcceptVerbs("GET")] public HttpResponseMessage GetFile(int _id) 

When trying to access either of these, I am getting the error shown in the question title. I must be missing something obvious but I can not put my finger on it. Any ideas?