.net core、.net8中间件中不能注入Service服务，报错：Cannot resolve scoped service 'XXX' from root provider

中间件中如果想用Service服务，不能用注入，需要这样写：

using (var serviceCope = httpContext.RequestServices.CreateScope())
{
    ISysSettingService? _sysSettingService = serviceCope.ServiceProvider.GetService<ISysSettingService>();
    if (_sysSettingService != null){...}
}

 来源：https://www.cnblogs.com/shipengfei/p/16092063.html