using System;

public class Program

{

    public static void Main()

    {

      byte[] bytes1 = { 0x00, 0x00, 0x00, 0x69 };

      Console.WriteLine("Entier lu ->" + BitConverter.ToUInt32(bytes1, 0));

​

     int original = 69;

      byte[] bytes = BitConverter.GetBytes(original);

      Console.WriteLine(String.Join(",", bytes));

   }

}