public static void Initialize(HttpConfiguration config) { var container = Container; var mvc4Resolver = new UnityDependencyResolver(container); DependencyResolver.SetResolver(mvc4Resolver); var previousResolver = DependencyResolver.Current; var newResolver = new Code.UnityDependencyResolver(container, previousResolver); DependencyResolver.SetResolver(newResolver); config.DependencyResolver = new Unity.WebApi.UnityDependencyResolver(container); }