using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace Numbers___their_Squares

{

    internal class Program

    {

        static void Main(string[] args)

        {

            int i = 10;

            do

            {

                Console.Write(i+"    ");

                Console.WriteLine(Math.Pow(i, 2));

                i--;

            } while (i > 0);

        }

    }

}

​