using System;
using System.IO;
namespace file_io
{
    class Program
    {
        public static void Main(string[] args)
        {
            string sor;
            string[] tomb = new string[20];
            int i = 0;
            StreamReader olvasó = new StreamReader("osztaly.dat");


            while (!olvasó.EndOfStream)
            {
                sor = olvasó.ReadLine();
                tomb[i] = sor;
                Console.WriteLine(sor);
                i++;
            }
            olvasó.Close();
                   
            StreamWriter író = new StreamWriter("forditott_sorrendben.txt");
            
            int n = i-1;
            while (n>0)
            {
                író.WriteLine(tomb[n]);
                n--;
            }
            író.Flush();
            író.Close();
            Console.WriteLine("Itt a vége!");
            Console.ReadKey(true);
        }
    }
}