Dependency injection in MVC Model Binder based on Paul Stovell's answere on http://stackoverflow.com/questions/10848560/using-dependency-injection-in-asp-net-mvc3-model-binder

DI_In_MVC_Model_Binder

public class UserModelBinder : IModelBinder
{
    public Func<UserDataService> UserData { get; set; }

    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        Guid UserID = (Guid)Membership.GetUser().ProviderUserKey;

        User u = UserData().GetUser(UserID);

        return u;
    }
}

// In Global.asax.cs
ModelBinders.Binders[typeof(User)] = new UserModelBinder() 
{  
    userData = () => DependencyResolver.Current.GetService<UserDataService>();
}