一、使用自带的IOC容器

参考自 https://www.cnblogs.com/dudu/p/5552293.html

1、添加程序包 Microsoft.Extensions.DependencyInjection

修改Program.cs

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IServiceCollection services = new ServiceCollection();
//注入
services.AddTransient<IMemcachedClient, MemcachedClient>();
services.AddTransient<MyTest>();
//构建容器
IServiceProvider serviceProvider = services.BuildServiceProvider();

//调用业务
var myTest = serviceProvider.GetService<MyTest>();
myTest?.test();
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MyTest.cs代码

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internal class MyTest
    {
        private IMemcachedClient _memcachedClient;
　　　　　//构造函数注入
        public MyTest(IMemcachedClient memcachedClient) 
        {
            _memcachedClient = memcachedClient;
        }
        public void test()
        {
            DateTime datetime = _memcachedClient.getTime();
            Console.WriteLine(datetime);
        }
    }
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 二、使用Autofac

1、添加程序包 Autofac 和 Autofac.Extensions.DependencyInjection

Program.cs

IServiceCollection services = new ServiceCollection();
            //用Autofac接管
            AutofacContainer.Build(services);

AutofacContainer.cs

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/// <summary>
    /// Autofac IOC 容器
    /// </summary>
    public class AutofacContainer
    {
        private static readonly ContainerBuilder _builder = new ContainerBuilder();
        private static IContainer _container;

        /// <summary>
        /// 构建IOC容器
        /// </summary>
        public static IServiceProvider Build(IServiceCollection services)
        {
            Assembly iserAss = Assembly.Load("CBest.AFS.Interface");
            Assembly serAss = Assembly.Load("CBest.AFS.Service");
            //创建serAss中的所有类的instance以此类的实现接口存储
            _builder.RegisterAssemblyTypes(iserAss, serAss).AsImplementedInterfaces();

            _builder.Populate(services);
            _container = _builder.Build();
            return new AutofacServiceProvider(_container);
        }

        /// <summary>
        ///
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public static T Resolve<T>()
        {
            return _container.Resolve<T>();
        }

        public static T Resolve<T>(params Parameter[] parameters)
        {
            return _container.Resolve<T>(parameters);
        }

        public static object Resolve(Type targetType)
        {
            return _container.Resolve(targetType);
        }

        public static object Resolve(Type targetType, params Parameter[] parameters)
        {
            return _container.Resolve(targetType, parameters);
        }
    }
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具体业务中的使用

private readonly IOrderInfoService _orderInfoService = AutofacContainer.Resolve<IOrderInfoService>();