Hi,

I am trying to use attribute routing with umbraco api controller. Everything works until i want to give my route a name, like so:

[RoutePrefix("api/sub/value")]
public class ValueController : UmbracoApiController
{

    [Route(Name = "GetValues")]
    public FormattedContentResult<string> Get()
    {

        return base.Content(HttpStatusCode.OK, "Content", new JsonMediaTypeFormatter());
    }
}

The route works quite well, however, when i try to log in to backoffice i am met with this:

System.ArgumentException: A route named 'GetValues' is already in the route collection. Route names must be unique.
Parameter name: name
   at System.Web.Routing.RouteCollection.Add(String name, RouteBase item)
   at System.Web.Http.WebHost.Routing.HostedHttpRouteCollection.Add(String name, IHttpRoute route)
   at System.Web.Http.Routing.AttributeRoutingMapper.AddGenerationHooksForSubRoutes(HttpRouteCollection routeTable, IEnumerable`1 entries)
   at System.Web.Http.Routing.AttributeRoutingMapper.<>c__DisplayClass2.<MapAttributeRoutes>b__0(HttpConfiguration config)
   at System.Web.Http.HttpConfiguration.ApplyControllerSettings(HttpControllerSettings settings, HttpConfiguration configuration)
   at System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type)
   at System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type)
   at System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type)
   at System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type)
   at System.Web.Http.Controllers.HttpControllerDescriptor..ctor(HttpConfiguration configuration, String controllerName, Type controllerType)
   at Umbraco.Web.Trees.ApplicationTreeExtensions.<TryGetRootNodeFromControllerTree>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Umbraco.Web.Trees.ApplicationTreeController.<GetRootForSingleAppTree>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Umbraco.Web.Trees.ApplicationTreeController.<GetApplicationTrees>d__0.MoveNext()<---

An example can be found here:

https://github.com/JannichIbsen/umbracoattributerouting

It doesnt matter what i name the route, it always fails in backoffice.

My question is, why is it double registered when i add the routename to me route attribute?