Foreground Threads And Thread IDs in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
namespace ForegroundThreadsAndThreadIDs
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 0; i < Environment.ProcessorCount; i++)
            {
                Thread thread = new Thread(DefferentThread);
                Thread.Sleep(1000);
                thread.Start(i);
            }
            Console.WriteLine("This is MainThread");
        }
        static void DefferentThread(object threadID)
        {
            while (true)
            {
                Thread.Sleep(1000);
                Console.WriteLine("This is DefferentThread:{0}-{1}", threadID, Thread.CurrentThread.ManagedThreadId);
            }
        }
    }
}