Mảng THREAD đơn giản

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

namespace TestDaLuong
{
    class Program
    {
        static void Main(string[] args)
        {
            Thread[] arrTh = new Thread[3];
            arrTh[0] = new Thread(new ThreadStart(a));
            arrTh[1] = new Thread(new ThreadStart(b));
            arrTh[2] = new Thread(new ThreadStart(c));
            for (int i = 0; i < arrTh.Length; i++)
            {
                arrTh[i].Start();
            }
                //Thread t1 = new Thread(new ThreadStart(a));
                //Thread t2 = new Thread(new ThreadStart(b));
                //Thread t3 = new Thread(new ThreadStart(c));
                //t1.Start();
                //t2.Start();
                //t1.Join();
                //t2.Join();
                //t3.Start();
                Console.ReadLine();
        }
        static void a()
        {
            for (int i = 0; i < 100; i++)
            {
                Console.Write("1 ");
            }
        }
        static void b()
        {
            for (int i = 0; i < 100; i++)
            {
                Console.Write("2 ");
            }
        }
        static void c()
        {
            for (int i = 0; i < 100; i++)
            {
                Console.Write("3 ");
            }
        }
    }
}