using System;

using System.Text;

public class Program

{

        public static void Main(string[] args)

    {

        StringBuilder sb = new StringBuilder();

​

        int[] numbers = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

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

        {

            StringBuilder numberBuilder = new StringBuilder();

            foreach (int number in numbers)

            {

                numberBuilder.Append(number + " ");

            }

​

            sb.Insert(0, numberBuilder.ToString());

        }

​

        Console.WriteLine(sb.ToString());

    }

}