public ServiceProvider(IEnumerable<ServiceDescriptor> serviceDescriptors){_root = this;_table = new ServiceTable(serviceDescriptors);_table.Add(typeof(IServiceProvider), new ServiceProviderService());_table.Add(typeof(IServiceScopeFactory), new ServiceScopeService());_table.Add(typeof(IEnumerable<>), new OpenIEnumerableService(_table));}

    internal class OpenIEnumerableService : IGenericService{private readonly ServiceTable _table;public OpenIEnumerableService(ServiceTable table){_table = table;}public ServiceLifetime Lifetime{get { return ServiceLifetime.Transient; }}public IService GetService(Type closedServiceType){var itemType = closedServiceType.GetTypeInfo().GenericTypeArguments[0];ServiceEntry entry;return _table.TryGetEntry(itemType, out entry) ?new ClosedIEnumerableService(itemType, entry) :null;}}

    internal class ClosedIEnumerableService : IService{private readonly Type _itemType;private readonly ServiceEntry _serviceEntry;public ClosedIEnumerableService(Type itemType, ServiceEntry entry){_itemType = itemType;_serviceEntry = entry;}public IService Next { get; set; }public ServiceLifetime Lifetime{get { return ServiceLifetime.Transient; }}public IServiceCallSite CreateCallSite(ServiceProvider provider, ISet<Type> callSiteChain){var list = new List<IServiceCallSite>();for (var service = _serviceEntry.First; service != null; service = service.Next){list.Add(provider.GetResolveCallSite(service, callSiteChain));}return new CallSite(_itemType, list.ToArray());}private class CallSite : IServiceCallSite{private readonly Type _itemType;private readonly IServiceCallSite[] _serviceCallSites;public CallSite(Type itemType, IServiceCallSite[] serviceCallSites){_itemType = itemType;_serviceCallSites = serviceCallSites;}public object Invoke(ServiceProvider provider){var array = Array.CreateInstance(_itemType, _serviceCallSites.Length);for (var index = 0; index != _serviceCallSites.Length; ++index){array.SetValue(_serviceCallSites[index].Invoke(provider), index);}return array;}public Expression Build(Expression provider){return Expression.NewArrayInit(_itemType,_serviceCallSites.Select(callSite =>Expression.Convert(callSite.Build(provider),_itemType)));}}}