Autofac integration ASP.Net MVC, WebAPI

AutofacIntegration

 private void RegisterIOC()
        {
            var builder = new ContainerBuilder();
            builder.RegisterControllers(typeof(MvcApplication).Assembly);
            builder.RegisterApiControllers(typeof(MvcApplication).Assembly);
            AutofacBootstrap.Init(builder);
            var container = builder.Build();
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
            GlobalConfiguration.Configuration.DependencyResolver = new Autofac.Integration.WebApi.AutofacWebApiDependencyResolver(container);
        }