ThreadingEx01.cs

using System;
using System.Threading;
 
class Program
{  
    static void Main(strin  g[] args)
    {
        Thread t1 = new Thread(MyBackgroundTask);
        t1.Start();

        for (int i = 0; i < 500; i++)
        {
            Console.Write(".");
        }
    }

    static void MyBackgroundTask()
    {
        for (int i = 0; i < 500; i++)
        {
            Console.Write("[" + Thread.CurrentThread.ManagedThreadId + "]");
        }
    }
}