asp.net Core中同名服务注册的实现代码

public class MyEmailService : IEmailService
		{
			public string Send(string Email)
			{
				return "My" + Email;
			}
		}

		public class EmailService : IEmailService
				return Email;

[Route("api/[controller]")]
		[ApiController]
		public class ValuesController : ControllerBase
		{
			private readonly IEnumerable<IEmailService> emailService;
			private readonly ILogger<ValuesController> logger;
			/// <summary>
			/// 注入IServiceProvider获取服务
			/// </summary>
			/// <param name="serviceProvider"></param>
			/// <param name="logger"></param>
			public ValuesController(IServiceProvider serviceProvider, ILogger<ValuesController> logger)
			{
				var service = serviceProvider.GetServices<IEmailService>(); //获取服务
				this.emailService = service;
				this.logger = logger;
			}
			[HttpGet]
			public IActionResult Send(string email)
				//可以遍历服务
				foreach (var emailService in emailService)
				{
					if(emailService.GetType() == typeof(First_EmailService))
					{ 
						//控制台输出调用日志
						logger.LogInformation(emailService.Send(email));
					}
				}
				return Ok();
		}

public class ConfigureAutofac : Autofac.Module
		{
			private static IContainer _container;
			protected override void Load(ContainerBuilder containerBuilder)
			{
				//注册两个不同命名的服务
				containerBuilder.RegisterType<EmailService>().Named<IEmailService>("one");
				containerBuilder.RegisterType<MyEmailService>().Named<IEmailService>("two");
				//需要在回调用获取容器
				containerBuilder.RegisterBuildCallback(container =>
				{
					_container = (IContainer)container;
					var one =  _container.ResolveNamed<IEmailService>("two");
					one.Send("one");
				});
			}
		}

/// <summary>
			/// ConfigureServices将默认的容器注入进去，Autofac会接替默认的，然后执行ConfigureContainer
			/// </summary>
			/// <param name="builder"></param>
			public void ConfigureContainer(ContainerBuilder builder)
			{
				builder.RegisterType<MyService>().As<IMyService>();
			}
	 
			//注册根容器
			public ILifetimeScope AutofacContainer { get; private set; }
			public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
				this.AutofacContainer = app.ApplicationServices.GetAutofacRoot();
				var serviceName = this.AutofacContainer.Resolve<IMyService>();
				serviceName.ShowCode();
				//...

services.AddSingleton<IApplicationBuilder, ApplicationBuilder>();

[Route("api/[controller]")]
		[ApiController]
		public class ValuesController : ControllerBase
		{
			private readonly IApplicationBuilder app;
			private readonly ILogger<ValuesController> logger;
			public ILifetimeScope AutofacContainer { get; private set; }
			public ValuesController(IApplicationBuilder app, ILogger<ValuesController> logger)
			{
				this.app = app;
				this.logger = logger;
			}
			[HttpGet]
			public IActionResult Send(string email)
				this.AutofacContainer = app.ApplicationServices.GetAutofacRoot();
				var serviceName = this.AutofacContainer.ResolveNamed<IEmailService>("one");
				logger.LogInformation(serviceName.Send(string.Empty));
				return Ok();
		}