Estoy usando SignalR en mi aplicación MVC3, y desde que implementé la inyección de dependencia de StructureMap en mis controladores, me gustaría hacer lo mismo en mi concentrador, pero parece que no puedo hacer que funcione.

Por favor, dime qué hay de malo con mis códigos a continuación:

SignalRSmDependencyResolver.cs

public class SignalRSmDependencyResolver : DefaultDependencyResolver
{
    private IContainer _container;

    public SignalRSmDependencyResolver(IContainer container)
    {
        _container = container;
    }

    public override object GetService(Type serviceType)
    {
        object service = null;
        if (!serviceType.IsAbstract && !serviceType.IsInterface && serviceType.IsClass)
        {
            // Concrete type resolution
            service = _container.GetInstance(serviceType);
        }
        else
        {
            // Other type resolution with base fallback
            service = _container.TryGetInstance(serviceType) ?? base.GetService(serviceType);
        }
        return service;
    }

    public override IEnumerable<object> GetServices(Type serviceType)
    {
        var objects = _container.GetAllInstances(serviceType).Cast<object>();
        objects.Concat(base.GetServices(serviceType));
        return objects;
    }
}

SignalRExtensionsRegistry.cs

public class SignalRExtensionsRegistry : Registry
{
    public SignalRExtensionsRegistry()
    {
        For<IDependencyResolver>().Add<SignalRSmDependencyResolver>();
    }
}

IoC.cs

public static class IoC {
    public static IContainer Initialize() {

        var container = BootStrapper.Initialize();

        container.Configure(x =>
        {
            x.For<IControllerActivator>().Singleton().Use<StructureMapControllerActivator>();
        });

        return container;
    }
}

public class StructureMapControllerActivator : IControllerActivator {
    public StructureMapControllerActivator(IContainer container) {
        _container = container;
    }

    private IContainer _container;

    public IController Create(RequestContext requestContext, Type controllerType) {
        IController controller = DependencyResolver.Current.GetService(controllerType) as IController;
        return controller;
    }
}

AppStart_Structuremap.cs

[assembly: WebActivator.PreApplicationStartMethod(typeof(StoreUI.AppStart_Structuremap), "Start")]

namespace MyNameSpace {
public static class AppStart_Structuremap {
    public static void Start() {
        var container = (IContainer) IoC.Initialize();
        DependencyResolver.SetResolver(new StructureMapDependenceyResolver(container));
        AspNetHost.SetResolver(new StructureMapDependencyResolver(container));            
    }
}
}

NotificacionesHub.cs

[HubName("notificationsHub")]
public class NotificationsHub : Hub
{    
    #region Declarations
    private readonly IUserService userService;
    #endregion

    #region Constructor

    public NotificationsHub(IUserService userService)
    {
        this.userService = userService;
    }

    #endregion

    public void updateServer(string message)
    {
        Clients.updateClient(message);
    }
}

Gracia