Method to Encrypt Eval Key

   public static string Encrypt(string queryString)
        {
            CryptoServices cryptoServicesObj;
            cryptoServicesObj = new CryptoServices();
            if (!string.IsNullOrEmpty(queryString))
            {
                return cryptoServicesObj.EncryptString(queryString, "56565656");
            }
            else
            {
                return queryString;
            }
        }