using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Threading;

using Timer = System.Timers.Timer;

​

    class EventClass

    {

        public event Action<DateTime> action;

        private void OnTimedEvent(Object source, System.Timers.ElapsedEventArgs e)

        {

            this.action.Invoke(DateTime.Now);

        }

        public EventClass()

        {

            var timer = new Timer();

            timer.AutoReset = true;

            timer.Interval = 1 * 1000;

            timer.Elapsed += (o, e) => action.Invoke(DateTime.Now);

            timer.Start();

        }

    }

    class Receiver

    {

        public Receiver(EventClass eventClass)

        {

            eventClass.action += this.PrintDate;

        }

        private void PrintDate(DateTime now)

        {

            Console.WriteLine(now);

        }

    }

​

public class Program

{

    public static void Main()

    {

        var receiver = new Receiver(new EventClass());

        while(true) {

        }

    }

}