File Directory Stream C# Tutorial

using System;
using System.IO;
static class MainClass
{
    static void Main()
    {
        // Create a new file and writer.
        using (FileStream fs = new FileStream("test.bin", FileMode.Create))
        {
            using (BinaryWriter w = new BinaryWriter(fs))
            {
                // Write a decimal, two strings, and a char.
                w.Write(124.23M);
                w.Write("Test string");
                w.Write("Test string 2");
                w.Write('!');
            }
        }
        using (FileStream fs = new FileStream("test.bin", FileMode.Open))
        {
            using (StreamReader sr = new StreamReader(fs))
            {
                // Read the data and convert it to the appropriate data type.
                fs.Position = 0;
                using (BinaryReader br = new BinaryReader(fs))
                {
                    Console.WriteLine(br.ReadDecimal());
                    Console.WriteLine(br.ReadString());
                    Console.WriteLine(br.ReadChar());
                }
            }
        }
    }
}
124.23
Test string
Test string 2
!