//Rextester.Program.Main is the entry point for your code. Don't change it.

//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

​

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text.RegularExpressions;

using System.Threading;

​

​

    public class Loop1

    {

        public void RunLoop1()

        {

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

            {

               Console.WriteLine("i : " + i);

            }

​

        }

​

    } 

     public class Loop2

     {

        public void RunLoop2()

        {

            for (int i = 10; i<= 20; i++)

            {

               Console.WriteLine("i : " + i);

            }

​

        }

​

    } 

    public class Program

    {

        public static void Main(string[] args)

        {

            //Your code goes here

            Console.WriteLine("Hello, world!");

            Loop1 lp1 = new Loop1();

            Loop2 lp2 = new Loop2();

            Thread t1 = new Thread(lp1.RunLoop1);

            Thread t2= new Thread(lp2.RunLoop2);

            t1.Start();

            t2.Start();

            t1.Sleep(1);

            t2.Sleep(1);

           // lp1.RunLoop1();

           // lp2.RunLoop2();

        }

    }

​