public static class UnityConfig
    {
        #region Unity Container
        private static Lazy container =
          new Lazy(() =>
          {
              var container = new UnityContainer();
              RegisterTypes(container);
              return container;
          });

        /// 

        /// Configured Unity Container.
        /// 
        public static IUnityContainer Container => container.Value;
        #endregion

        /// 

        /// Registers the type mappings with the Unity container.
        /// 
        /// The unity container to configure.
        /// 
        /// There is no need to register concrete types such as controllers or
        /// API controllers (unless you want to change the defaults), as Unity
        /// allows resolving a concrete type even if it was not previously
        /// registered.
        /// 
        public static void RegisterTypes(IUnityContainer container)
        {
            // NOTE: To load from web.config uncomment the line below.
            // Make sure to add a Unity.Configuration to the using statements.
            // container.LoadConfiguration();

            // TODO: Register your type‘s mappings here.
            // container.RegisterType();
            container.RegisterType();
        }

 public class HomeController : Controller
    {
        private IRepository _repository;
        public HomeController(IRepository repository)
        {
            _repository = repository;
        }

        public ActionResult Index()
        {
            var result = _repository.Test();
            return View(result);
        }
｝

 public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
            UnityConfig.RegisterTypes(new UnityContainer());
        }
    }