using System;

using System.IO;

using System.Text;

public class Program

{

    public static void Main()

    {

        var fileName = "filename.txt";

        // CREATE a file in your Sandbox using .NET Fiddle 

        WriteFile(fileName);

        // READ an existing file in your Sandbox using .NET Fiddle

        var s = ReadAllText(fileName);

        Console.WriteLine(s);

        var blah = s.Replace(System.Environment.NewLine, ",").Replace(" ", "").Split(',');

        Console.WriteLine(s.Replace(System.Environment.NewLine, ","));

        for(int i = 0; i < blah.Length; i++)

        {

            Console.Write(blah.GetValue(i) + " ");

            Console.WriteLine(Convert.ToInt32(blah.GetValue(i)).ToString("X"));

            //Console.WriteLine(Convert.ToInt32(blah[i], 16));

            //Console.WriteLine(Convert.ToInt32(blah.GetValue(i)));

            //Console.WriteLine(Convert.ToInt32((int)blah.GetValue(i), 16));

        }

    }

    public static void WriteFile(string path)

    {

        File.WriteAllText(path, 

                          "0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,56,58,60,62,63,0,0,0,0,0,0,0,0\r\n0,0,0,0,0");

    }

    public static string ReadAllText(string path)

    {

        return File.ReadAllText(path);

    }

}