using System.Threading;

using System.Threading.Tasks;

using System;

public class Program

{

      public static void Main(string[] args)

        {

            // thread = an execution path of a program

            //          We can use multiple threads to perform,

            //          different tasks of our program at the same time.

            //          Current thread running is "main" thread

            //          using System.Threading;

​

            Thread mainThread = Thread.CurrentThread;

            mainThread.Name = "Main Thread";

            //Console.WriteLine(mainThread.Name);

​

            Thread thread1 = new Thread(() => CountDown("Timer #1"));

            Thread thread2 = new Thread(() => CountUp("Timer #2"));

​

            thread1.Start();

            thread2.Start();

​

            Console.WriteLine(mainThread.Name + " is complete!");

​

        }  

        public static void CountDown(String name)

        {

            for (int i = 10; i >= 0; i--)

            {

                Console.WriteLine("Timer #1 : " + i + " seconds");

                Thread.Sleep(1000);

            }

            Console.WriteLine("Timer #1 is complete!");

        }

        public static void CountUp(String name)

        {

            for (int i = 0; i <= 10; i++)

            {

                Console.WriteLine("Timer #2 : " + i + " seconds");

                Thread.Sleep(1000);

            }

            Console.WriteLine("Timer #2 is complete!");

        }

}