C# Sharepoint tCompressedString to string(xml)

Sharepoint 2010 설치 후 데이터베이스를 보다가 보면 tCompressedString 타입이라면서 암호화된 문자열을 볼 수가 있다.
그 문자열을 복호화해주는 코드라고 볼 수 있다.

private string Decompress(byte[] compressedBytesBuffer)

{

    string uncompressedString = String.Empty;

    using (MemoryStream compressedMemoryStream = new MemoryStream(compressedBytesBuffer))

    {

        compressedMemoryStream.Position += 12; // Compress Structure Header according to [MS -WSSFO2].

        compressedMemoryStream.Position += 2; // Zlib header.

        using (DeflateStream deflateStream = new DeflateStream(compressedMemoryStream, CompressionMode.Decompress))

        {

            using (MemoryStream uncompressedMemoryStream = new MemoryStream())

            {

                deflateStream.CopyTo(uncompressedMemoryStream);

                uncompressedMemoryStream.Position = 0;

                using (StreamReader streamReader = new StreamReader(uncompressedMemoryStream))

                {

                    uncompressedString = streamReader.ReadToEnd();

                }

            }

        }

    }

    return uncompressedString;

}

private byte[] ConvertHexStringToByte(string convertString)

{

    convertString = convertString.Replace("0x", "");

    byte[] convertArr = new byte[convertString.Length / 2];

    for (int i = 0; i < convertArr.Length; i++)

    {

        convertArr[i] = Convert.ToByte(convertString.Substring(i * 2, 2), 16);

    }

    return convertArr;

}

// 예제

string sampleString;

string xmlString = Decompress(ConvertHexStringToByte(sampleString));