从字符串到字节数组C＃发送字符

Question

Which encoding should I use to write bbb to a file as exact bytes, so if the file were opened in a hex editor, its contents would be "99 59"?

The following methods created incorrect results, as listed:

Byte[] bbb = { 0x99, 0x59 };
string o = System.Text.Encoding.UTF32.GetString(bbb);

UTF32 (above) writes 'EF BF BD', UTF7 writes 'C2 99 59', UTF8 writes 'EF BF BD 59', Unicode writes 'E5 A6 99', ASCII writes '3F 59'

What encoding will produce the un-changed 8-bit bytes?

Answer 1

If you want bytes to be written unencoded to a file/stream, simply write them to the file/stream.

File.WriteAllBytes(@"d:\temp\test.bin", bbb);

or

stream.Write(bbb, 0, bbb.Length);

Don't encode them at all.