public static string Decrypt(string toDecrypt) {
	byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678901234567890123456789012");
	byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);

	RijndaelManaged rDel = new RijndaelManaged();
	rDel.Key = keyArray;
	rDel.Mode = CipherMode.ECB;
	rDel.Padding = PaddingMode.PKCS7;

	ICryptoTransform cTransform = rDel.CreateDecryptor();
	byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

	return UTF8Encoding.UTF8.GetString(resultArray);
}