Autofac 控制反转

    class Program
    {
        static void Main(string[] args)
        {
            IContainer container = Init();
            Go(container);

            Console.WriteLine("========================");

            ISchool a = container.Resolve<ISchool>();
            a.FangXue();

            Console.ReadKey();
        }
        static IContainer Init()
        {
            ContainerBuilder builder = new ContainerBuilder();
            Assembly asm = Assembly.Load(Assembly.GetExecutingAssembly().GetName().Name);
            builder.RegisterAssemblyTypes(asm).AsImplementedInterfaces().PropertiesAutowired().SingleInstance();
            //SingleInstance()单例,共享同一个对象,PropertiesAutowired()属性自动注入
            IContainer container = builder.Build();
            return container;
        }
        static void Go(IContainer container)
        {
            IDogBLL schoolBll = container.Resolve<IDogBLL>();
            schoolBll.Bark();
            IDogBLL schoolBll2 = container.Resolve<IDogBLL>();
            Console.WriteLine(schoolBll.Equals(schoolBll2));
        }
    }
    public interface IDogBLL
    {
        void Bark();
    }
    public class DogBLL : IDogBLL
    {
        public void Bark()
        {
            Console.WriteLine("汪汪汪");
        }
    }
    public interface ISchool
    {
        void FangXue();
    }
    public class School : ISchool
    {
        public IDogBLL dogBll { get; set; }
        public void FangXue()
        {
            dogBll.Bark();
            Console.WriteLine("放学了");
        }
    }

 Autofac.Mvc

        private void AutoFacMvc()
        {
            //using Autofac.Integration.Mvc;
            ContainerBuilder builder = new ContainerBuilder();
            // 把当前的 程序集中的 Controller 都注册
            builder.RegisterControllers(typeof(MvcApplication).Assembly).PropertiesAutowired();
            // 不要忘了.PropertiesAutowired()
            Assembly asm = Assembly.Load("TestService"); //获取所有相关类库的程序集
            builder.RegisterAssemblyTypes(asm).Where(e => !e.IsAbstract).AsImplementedInterfaces().PropertiesAutowired();

            // 把当前的 程序集中的 所有类 都注册
            builder.RegisterAssemblyTypes(typeof(MvcApplication).Assembly).PropertiesAutowired();

            Autofac.IContainer container = builder.Build();
            //注册系统级别的 DependencyResolver,
            //这样当 MVC框架创建Controller等对象的时候都是管Autofac要对象。 
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));   //!!!
        }

  Autofac.Mvc单独注册

            var test = DependencyResolver.Current.GetService<TestHelper>();
            var res = test.GetDateTime();

不在Mvc线程里单独注册

                var container = AutofacDependencyResolver.Current.ApplicationContainer;
                using (container.BeginLifetimeScope())
                {
                    var citySvc = container.Resolve<ICityService>();
                }