/// <summary>
        /// Registers a collection of <paramref name="registrations"/>, whose instances will be resolved lazily
        /// each time the resolved collection of <paramref name="serviceType"/> is enumerated.
        /// The underlying collection is a stream that will return individual instances based on their
        /// specific registered lifestyle, for each call to <see cref="IEnumerator{T}.Current"/>.
        /// The order in which the types appear in the collection is the exact same order that the items were
        /// registered, i.e the resolved collection is deterministic.
        /// </summary>
        /// <param name="serviceType">The base type or interface for elements in the collection. This can be
        /// an a non-generic type, closed generic type or generic type definition.</param>
        /// <param name="registrations">The collection of <see cref="Registration"/> objects whose instances
        /// will be requested from the container.</param>
        /// <exception cref="ArgumentNullException">Thrown when one of the supplied arguments is a null
        /// reference (Nothing in VB).
        /// </exception>
        /// <exception cref="ArgumentException">Thrown when <paramref name="registrations"/> contains a null
        /// (Nothing in VB) element or when <paramref name="serviceType"/> is not assignable from any of the
        /// service types supplied by the given <paramref name="registrations"/> instances.
        /// </exception>
        public void RegisterCollection(Type serviceType, IEnumerable <Registration> registrations)
        {
            Requires.IsNotNull(serviceType, "serviceType");
            Requires.IsNotNull(registrations, "registrations");

            // Make a copy for performance and correctness.
            registrations = registrations.ToArray();

            Requires.DoesNotContainNullValues(registrations, "registrations");
            Requires.AreRegistrationsForThisContainer(this, registrations, "registrations");
            Requires.ServiceIsAssignableFromImplementations(serviceType, registrations, "registrations", typeCanBeServiceType: true);
            Requires.OpenGenericTypesDoNotContainUnresolvableTypeArguments(serviceType, registrations, "registrations");

            this.RegisterCollectionInternal(serviceType, registrations);
        }
        private ContainerControlledCollection <TService> CreateInternal <TService>(
            IEnumerable <Registration> registrations)
            where TService : class
        {
            Requires.IsNotAnAmbiguousType(typeof(TService), nameof(TService));
            Requires.IsNotNull(registrations, nameof(registrations));

            Requires.DoesNotContainNullValues(registrations, nameof(registrations));
            Requires.AreRegistrationsForThisContainer(this.container, registrations, nameof(registrations));
            Requires.ServiceIsAssignableFromImplementations(typeof(TService), registrations, nameof(registrations),
                                                            typeCanBeServiceType: true);
            Requires.OpenGenericTypesDoNotContainUnresolvableTypeArguments(typeof(TService), registrations,
                                                                           nameof(registrations));

            var collection = new ContainerControlledCollection <TService>(this.container);

            collection.AppendAll(registrations);

            this.RegisterForVerification(collection);

            return(collection);
        }