AlarmingDelegates.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;

namespace MysteryOfDelegates
{
    public class Clock
    {
        public DateTime Alarm { get; set; }
    }

    public delegate void ClockAlarm(Clock clock, string name);
    class Program
    {
        static void Main(string[] args)
        {
            var clock = new Clock();
            clock.Alarm =  DateTime.Now.AddSeconds(5);

            ClockAlarm clockAlarm;
            clockAlarm = Wakeup;
        }

        private static void Wakeup(Clock clock, string name)
        {
            while (true)
            {
                Thread.Sleep(1000);
                DateTime currentTime = DateTime.Now;

                if (currentTime.Second == clock.Alarm.Second)
                {
                    Console.WriteLine(name + ", " + "Please wake up!!!!");
                    break;
                }

                Console.WriteLine("Clock is ticking!!!");
            }
        }
    }
}