using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var trans = "[\r\n\t{\r\n\t\t\"AccountId\": \"acc_00009ZkzHz32kXlzI2ctBB\",\r\n\t\t\"TransactionId\": \"tx_0000A1r0dWHExgupNeyAUL\",\r\n\t\t\"CreditDebitIndicator\": \"Debit\",\r\n\t\t\"Status\": \"Pending\",\r\n\t\t\"BookingDateTime\": \"2020-12-04T10:01:42.793Z\",\r\n\t\t\"TransactionInformation\": \"Zego\",\r\n\t\t\"Amount\": {\r\n\t\t\t\"Amount\": \"472.6500\",\r\n\t\t\t\"Currency\": \"GBP\"\r\n\t\t},\r\n\t\t\"ProprietaryBankTransactionCode\": {\r\n\t\t\t\"Code\": \"mastercard\",\r\n\t\t\t\"Issuer\": \"Monzo\"\r\n\t\t},\r\n\t\t\"MerchantDetails\": {\r\n\t\t\t\"MerchantCategoryCode\": \"8999\"\r\n\t\t},\r\n\t\t\"SupplementaryData\": {\r\n\t\t\t\"Declined\": true,\r\n\t\t\t\"RawTransactionDescription\": \"ZEGO                   +442033089800 GBR\"\r\n\t\t}\r\n\t},\r\n\t{\r\n\t\t\"AccountId\": \"acc_00009ZkzHz32kXlzI2ctBB\",\r\n\t\t\"TransactionId\": \"tx_0000A1r0dWHExgupNeyAUD\",\r\n\t\t\"CreditDebitIndicator\": \"Debit\",\r\n\t\t\"Status\": \"Pending\",\r\n\t\t\"BookingDateTime\": \"2020-12-04T10:01:42.793Z\",\r\n\t\t\"TransactionInformation\": \"Zego\",\r\n\t\t\"Amount\": {\r\n\t\t\t\"Amount\": \"472.6500\",\r\n\t\t\t\"Currency\": \"GBP\"\r\n\t\t},\r\n\t\t\"ProprietaryBankTransactionCode\": {\r\n\t\t\t\"Code\": \"mastercard\",\r\n\t\t\t\"Issuer\": \"Monzo\"\r\n\t\t},\r\n\t\t\"MerchantDetails\": {\r\n\t\t\t\"MerchantCategoryCode\": \"8999\"\r\n\t\t},\r\n\t\t\"SupplementaryData\": {\r\n\t\t\t\"RawTransactionDescription\": \"ZEGO                   +442033089800 GBR\"\r\n\t\t}\r\n\t},\r\n\t{\r\n\t\t\"AccountId\": \"acc_00009ZkzHz32kXlzI2ctBB\",\r\n\t\t\"TransactionId\": \"tx_0000A1r0dWHExgupNeyAUF\",\r\n\t\t\"CreditDebitIndicator\": \"Debit\",\r\n\t\t\"Status\": \"Pending\",\r\n\t\t\"BookingDateTime\": \"2020-12-04T10:01:42.793Z\",\r\n\t\t\"TransactionInformation\": \"Zego\",\r\n\t\t\"Amount\": {\r\n\t\t\t\"Amount\": \"472.6500\",\r\n\t\t\t\"Currency\": \"GBP\"\r\n\t\t},\r\n\t\t\"ProprietaryBankTransactionCode\": {\r\n\t\t\t\"Code\": \"mastercard\",\r\n\t\t\t\"Issuer\": \"Monzo\"\r\n\t\t},\r\n\t\t\"MerchantDetails\": {\r\n\t\t\t\"MerchantCategoryCode\": \"8999\"\r\n\t\t}\t\t\r\n\t}\r\n]";

        var transactions = JsonConvert.DeserializeObject<List<dynamic>>(trans);

        foreach(var t in transactions)

        {

            dynamic declined = (bool?)t.SupplementaryData?.Declined ?? false;

            Console.WriteLine($"{t.TransactionId} is {declined}");

        }

    }

}

​

​