using System;

using System.IO;

public class Program

{

    public static void Main()

    {

        StreamWriter sw = new StreamWriter("filename.txt");

        sw.WriteLine("test");

        sw.WriteLine("test1");

        sw.WriteLine("test2");

        sw.Close();

        StreamReader sr = new StreamReader("filename.txt");

        while (!sr.EndOfStream){

            Console.WriteLine(sr.ReadLine());

        }

        sr.Close();

    }

}