static void Main(string[] args)

        {

            SystemTimersDemo();

            Console.ReadLine();

        }

        static void SystemTimersDemo()

        {

            System.Timers.Timer timer = new System.Timers.Timer();

            timer.Elapsed += Timer_Elapsed;

            timer.AutoReset = true;

            timer.Enabled = true;

        }

        private static void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)

        {

            Console.WriteLine($"The Elapsed event was raised at {e.SignalTime.ToString("yyyyMMddHHmmssffff")}");

        }