public class MvcApplication : System.Web.HttpApplication
{
        protected void Application_Start()
        {
            //Autofac初始化过程
            var builder = new ContainerBuilder();
            builder.RegisterControllers(typeof(MvcApplication).Assembly);//注册所有的Controller
            //开发环境下，使用Stub类
            builder.RegisterAssemblyTypes(typeof (MvcApplication).Assembly).Where(
                t => t.Name.EndsWith("Repository") && t.Name.StartsWith("Stub")).AsImplementedInterfaces();
            //发布环境下，使用真实的数据访问层
            //builder.RegisterAssemblyTypes(typeof(MvcApplication).Assembly).Where(
            //   t => t.Name.EndsWith("Repository")).AsImplementedInterfaces();

            var container = builder.Build();
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

            //其它的初始化过程
            ........
        }
}

//开发环境下，使用Stub类
builder.RegisterAssemblyTypes(typeof (MvcApplication).Assembly).Where(
             t => t.Name.EndsWith("Repository") && t.Name.StartsWith("Stub")).AsImplementedInterfaces();

//发布环境下，使用真实的数据访问层
builder.RegisterAssemblyTypes(typeof(MvcApplication).Assembly).Where(t => t.Name.EndsWith("Repository")).AsImplementedInterfaces();