System.Net.SendWol.GetWolPacket C# (CSharp) Method

        private static byte[] GetWolPacket(byte[] macAddress, byte[] password)
        {
            if (macAddress == null)
                throw new ArgumentNullException(nameof(macAddress));
            if (macAddress.Length != 6)
                throw new ArgumentException(Localization.ArgumentExceptionInvalidMacAddressLength);

            password = password ?? new byte[0];
            if (password.Length != 0 && password.Length != 6)
                throw new ArgumentException(Localization.ArgumentExceptionInvalidPasswordLength);

            var packet = new byte[17 * 6 + password.Length];

            int offset, i;
            for (offset = 0; offset < 6; ++offset)
                packet[offset] = 0xFF;

            for (offset = 6; offset < 17 * 6; offset += 6)
                for (i = 0; i < 6; ++i)
                    packet[i + offset] = macAddress[i];

            if (password.Length > 0)
            {
                for (offset = 16 * 6 + 6; offset < (17 * 6 + password.Length); offset += 6)
                    for (i = 0; i < 6; ++i)
                        packet[i + offset] = password[i];
            }
            return packet;
        }