AutoFac+ASP.NetMvc,AspNet.Core

install-package autofac
install-package Mvc5

//创建一个用于注册的对象
ContainerBuilder  builder = new ContainerBuilder()
//获取实现类的程序集
Assembly[] assembly = new Assembly[]{Assembly.Load(实现类程序集)}
builder.RegisterAssemblyTypes(assembly) //注册程序集
         .Where(y=>!y.IsAbstract)//不是抽象类
         .AsImplementedInterfaces()//注册所有实现接口
         .PropertiesAutowired(); //自动注入 (必须为属性)

//将本程序所有控制器全部注册
builder.RegisterControllers(typeof(MvcApplication).Assembly)
         .PropertiesAutowired();
Container container = builder.Build();
//将当前容器的控制器工厂替换掉默认的控制器工厂,(即:不要MVC默认的控制器工厂,用autofac容器中的控制器替代)
//DefaultControllerFactory  mvc默认的控制器工厂
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

install-package autofac
install-package autofac-extensions.DependencyInjection

public  IServiceProvider ConfigureServices(IServiceCollection service)
        {
            service.AddMvc();
            var builder = new ContainerBuilder();
            Assembly[] assembly = new Assembly[] { Assembly.Load("AutoFacDemo.BLL") };
            builder.RegisterAssemblyTypes(assembly)
             .AsImplementedInterfaces()
             .PropertiesAutowired();
            builder.Populate(service);
            return new AutofacServiceProvider(builder.Build());
            
        }