public static string Decrypt(string strInputString, string strKeyString, string myIV)
{
        if ((strInputString == null) || (strInputString.Length == 0))
        {
            return strInputString;
        }
        try
        {
            int num5;
            int keySize = 0x100;
            int blockSize = 0x100;
            int length = keySize / 0x10;
            if (strKeyString.Length > length)
            {
                strKeyString = strKeyString.Substring(0, length);
            }
            if (strKeyString.Length < length)
            {
                strKeyString = strKeyString.PadRight(length, '#');
            }
            Encoding.Unicode.GetBytes(strKeyString);
            if (myIV.Length > length)
            {
                myIV = myIV.Substring(0, length);
            }
            if (myIV.Length < length)
            {
                myIV = myIV.PadRight(length, '#');
            }
            Encoding.Unicode.GetBytes(myIV);
            byte[] bytes = Encoding.Unicode.GetBytes(strKeyString);
            byte[] rgbIV = Encoding.Unicode.GetBytes(myIV);
            RijndaelManaged managed = new RijndaelManaged {
                BlockSize = blockSize,
                KeySize = keySize
            };
            MemoryStream stream = new MemoryStream();
            for (int i = 0; i < strInputString.Length; i += 2)
            {
                stream.WriteByte(byte.Parse(strInputString.Substring(i, 2), NumberStyles.AllowHexSpecifier));
            }
            stream.Position = 0L;
            MemoryStream stream2 = new MemoryStream();
            CryptoStream stream3 = new CryptoStream(stream, managed.CreateDecryptor(bytes, rgbIV), CryptoStreamMode.Read);
            while ((num5 = stream3.ReadByte()) != -1)
            {
                stream2.WriteByte((byte) num5);
            }
            stream3.Close();
            stream2.Close();
            stream.Close();
            byte[] buffer3 = stream2.ToArray();
            return Encoding.Unicode.GetString(buffer3);
        }
        catch (Exception exception)
        {
            Log.Error(exception.Message);
        }
}