static private FileStream freader;
    static private StreamReader reader;
    static private StreamWriter writer;
    static private int fileContents;

    static void Main()
    {
        string counter_file = "counter.txt";
        
            freader = new FileStream(counter_file, FileMode.Open, FileAccess.ReadWrite);
            reader = new StreamReader(freader);
            fileContents = Int32.Parse(reader.ReadToEnd());
            fileContents++;
            writer = new StreamWriter(freader);
            writer.Write(fileContents);
            reader.Close();
            freader.Close();