Castle Typed Factory for .NET Core

project.json

{
  "dependencies":{
    "Castle.Core": "4.0.0-beta002"
  }
}

ServiceCollectionExtensions.cs

    public static class ServiceCollectionExtensions
    {
        private static readonly IProxyGenerator ProxyGenerator = new ProxyGenerator(true);

        public static IServiceCollection AddTypedFactory<T>(this IServiceCollection services, ServiceLifetime lifetime = ServiceLifetime.Transient) where T : class
        {
            services.TryAddSingleton<TypedFactoryInterceptor>();
            services.Add(new ServiceDescriptor(typeof(T), CreateProxy<T>, lifetime));
            return services;
        }

        public static T CreateProxy<T>(IServiceProvider serviceProvider) where T : class
        =>
            ProxyGenerator.CreateInterfaceProxyWithoutTarget<T>(
                serviceProvider.GetRequiredService<TypedFactoryInterceptor>());
    }

TypedFactoryInterceptor.cs

    public class TypedFactoryInterceptor : IInterceptor
    {
        private readonly IServiceProvider _serviceProvider;

        public TypedFactoryInterceptor(IServiceProvider serviceProvider)
        {
            if (serviceProvider == null) throw new ArgumentNullException(nameof(serviceProvider));
            _serviceProvider = serviceProvider;
        }

        public void Intercept(IInvocation invocation)
        {
            invocation.ReturnValue = ActivatorUtilities.GetServiceOrCreateInstance(_serviceProvider, invocation.Method.ReturnType);
        }
    }