gistfile1.cs

public string encriptaRijndael(string ccNum)
{
  IniFile ini = new IniFile("C:\\Adquira/config/Rijndael.properties");
  byte[] keyArray = UTF8Encoding.Default.GetBytes(ini.IniReadValue("Info", "KEY"));
  byte[] resultArray = new byte[0];
  byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(ccNum);

  try
  {
    if (keyArray.Length > 0)
    {
      RijndaelManaged rDel = new RijndaelManaged();
      rDel.Key = keyArray;
      rDel.Mode = CipherMode.ECB;
      rDel.Padding = PaddingMode.Zeros;
      ICryptoTransform cTransform = rDel.CreateEncryptor();
      resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
    }
  }
  catch (Exception)
  {
    //("ERROR EN EL CIFRADO (Rijndael).");
  }

  return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}