ICSharpCode.SharpZipLib.Zip.ZipExtraData.AddData C# (CSharp) Method

        public void AddData(byte data) {
            _newEntry.WriteByte(data);
        }

 private static void AddExtraDataAES(ZipEntry entry, ZipExtraData extraData)
 {
     extraData.StartNewEntry();
     extraData.AddLeShort(2);
     extraData.AddLeShort(17729);
     extraData.AddData(entry.AESEncryptionStrength);
     extraData.AddLeShort((int)entry.CompressionMethod);
     extraData.AddNewEntry(39169);
 }