Multithreaded Programming Using C#

using System;
using System.Threading;

public class MyThread {

        public void Thread1() {
                for (int i = 0; i < 10; i++) {

			int iHour = 0;
			int iMin = 0;
			int iSec = -1;

			try {
		            Console.WriteLine("Hello world " + i);
				Thread.Sleep(new TimeSpan(iHour, iMin, iSec) );
			}
			catch (ArgumentException ae) {
				Console.WriteLine(ae.Message );
			}

                }
        }
}

public class MyClass {

        public static void Main() {
            Console.WriteLine("Before start thread");

    	      MyThread thr1 = new MyThread();
	      MyThread thr2 = new MyThread();

            Thread tid1 = new Thread(new ThreadStart(thr1.Thread1) );
            Thread tid2 = new Thread(new ThreadStart(thr2.Thread1) );

            tid1.Start();
            tid2.Start();
        }
}