// s = '1234'
  ....
  byte[] bytes = Encoding.Unicode.GetBytes(s);
  // bytes = 49, 0, 50, 0, 51, 0, 52, 0

##</code><code>##

  my $data = encode("UTF-16LE", .....);

##</code><code>##

  my $data = encode("UTF-16", '1234');

##</code><code>##

  0xFE 0xFF 0x00 0x31 0x00 0x32 0x00 0x33 0x00 0x34

##</code><code>##

  my $data = encode("UTF-16LE", '1234');

##</code><code>##

  0x31 0x00 0x32 0x00 0x33 0x00 0x34 0x00