C#EventDriven_Time_3а

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

namespace EventDriven3a
{
    class Time
    {
        public delegate void TickEventHandler(object sender, TickEventArgs e);

        public event TickEventHandler Tick;

        protected virtual void OnTick(TickEventArgs e)
        {
            if (Tick != null) {
                Tick(this, e);
            }
        }

        public void Start()
        {
            while (true) {
                TickEventArgs e = new TickEventArgs();
                e.TimeNow = DateTime.Now;
                OnTick(e);
                System.Threading.Thread.Sleep(3000);
            }
        }
    }
}