ConfigureServices返回类型改为IServiceProviderpublic IServiceProvider ConfigureServices(IServiceCollection services)
{
    services.AddMvc();
    可以将下面代码单独放入到一个文件
   var builder = new ContainerBuilder();
    builder.Populate(services);
    builder.RegisterAssemblyTypes(typeof(Startup).Assembly).AsImplementedInterfaces();
    var Container = builder.Build();
    return new AutofacServiceProvider(Container);
}
原文:https://www.cnblogs.com/hack301/p/9632739.html