Se dépalcer dans un fichier binaire: non Verifié

using System;
using System.IO;
using System.Text;
 
class ExempleDecoder
{
  static void Main(string[] args)  {
         byte[] byData = new byte[10];
         char[] charData = new Char[10];
 
         try {
            FileStream aFile = new FileStream("test.txt",FileMode.Open);
            aFile.Seek(55,SeekOrigin.Begin);
            aFile.Read(byData,0,10);
         }
         catch(IOException e)
         {
            Console.WriteLine("An IO exception has been thrown!");
            Console.WriteLine(e.ToString());
            Console.ReadLine();
            return;
         }
 
         Decoder d = Encoding.UTF8.GetDecoder();
         d.GetChars(byData, 0, byData.Length, charData, 0);
 
         Console.WriteLine(charData);
         return;
  }
}