C#: Binary Stream

 

using System;
using System.IO;

public class Program
{
 public static void Main()
 {
 using (BinaryWriter writer1 = new BinaryWriter(File.Open("test.bin", FileMode.OpenOrCreate)))
 {
 writer1.Write(new byte[]{0x30, 0x31, 0x32, 0x33});
 writer1.Close();
 }

 using (BinaryReader reader1 = new BinaryReader(File.Open("test.bin", FileMode.Open)))
 {
 byte[] buffer = reader1.ReadBytes(4);
 reader1.Close();

 foreach (byte b in buffer)
 {
 Console.Write(b);
 Console.Write(' ');
 }
 }

 Console.WriteLine();
 }
}