C#

using (FileStream fs = File.OpenRead(filename))
{
      byte[] b = new byte[10000];
      UTF8Encoding temp = new UTF8Encoding(false,true);
      int l=0;

      FileStream fw= File.Open("copy.txt",System.IO.FileMode.Create);

      while ((l = fs.Read(b,0,b.Length)) > 0)
      {
           string s= temp.GetString(b, 0, l);
           Console.WriteLine(s);
           //...
      }
      fw.Close();
}