DependencyResolver

I have a library with class, DraftEngine.cs, and within DraftEngine.cs, I have a RegisterDependencies. Updating Microsoft.AspNet.Mvc to the latest package, 6.0, DependencyResolver does not exist, as it is part of System.Web.Mvc.

        protected virtual void RegisterDependencies(DraftConfig config)
        {
            var builder = new ContainerBuilder();
            var container = builder.Build();
            _containerManager = new ContainerManager(container);
            var typeFinder = new WebAppTypeFinder();
            builder = new ContainerBuilder();
            builder.RegisterInstance(config).As<DraftConfig>().SingleInstance();
            builder.RegisterInstance(this).As<IEngine>().SingleInstance();
            builder.RegisterInstance(typeFinder).As<ITypeFinder>().SingleInstance();
            builder.Update(container);
            builder = new ContainerBuilder();
            var drTypes = typeFinder.FindClassesOfType<IDependencyRegistrar>();
            var drInstances = new List<IDependencyRegistrar>();
            foreach (var drType in drTypes)
                drInstances.Add((IDependencyRegistrar)Activator.CreateInstance(drType));
            drInstances = drInstances.AsQueryable().OrderBy(t => t.Order).ToList();
            foreach (var dependencyRegistrar in drInstances)
                dependencyRegistrar.Register(builder, typeFinder, config);
            builder.Update(container);DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
        }

I have combed through the Dependency Injection article but couldn't find a fix to the problem, or maybe I missed something. Any help would be greatly appreciated.