private static void AddExtraDataAes(ZipEntry entry, ZipExtraData extraData) { extraData.StartNewEntry(); extraData.AddLeShort(2); extraData.AddLeShort(0x4541); extraData.AddData(entry.AesEncryptionStrength); extraData.AddLeShort((int)entry.CompressionMethod); extraData.AddNewEntry(0x9901); }