public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;
        private readonly IOptions<MailConfig> _config;
        public HomeController(ILogger<HomeController> logger, IOptions<MailConfig> config)
        {
            _logger = logger;
            _config = config;
        }
        public IActionResult Index()
        {
            string companyEmail = _config.Value.mailFrom;
            string hostName = _config.Value.host;
            string password = _config.Value.password;
            int portNo = _config.Value.portNo;
            return View();
        }
   }