using System;
using System.IO;

class Program
{
    static void Main()
    {
        Console.WriteLine("Írás");

        FileStream folyam = new FileStream("adat.txt", FileMode.Append);
        StreamWriter iro = new StreamWriter(folyam);

        iro.Write("valami");
        iro.Write(45);
        iro.Flush();

        iro.Write(60);
        iro.WriteLine();
        iro.Close();

    }
}