using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

using System.Collections.ObjectModel;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/62332366/reading-json-by-json-tag

    class TestClass

    {

        public static void Test()

        {

            TestJsonPath();

            TestIndexers();

        }   

        public static void TestJsonPath()

        {

            var JSONResponse = GetJson();

            var data = JsonConvert.DeserializeObject<JObject>(JSONResponse);

            //var x = data["clientResponsePayload.orchestrationDecisions.sequenceId"].Value<string>();

            var x = data.SelectToken("clientResponsePayload.orchestrationDecisions[0].sequenceId")?.Value<string>();

            Console.WriteLine(x == null);

            Console.WriteLine(x);

            Assert.AreEqual("1", x);

        }           

        public static void TestIndexers()

        {

            var JSONResponse = GetJson();

            var data = JsonConvert.DeserializeObject<JObject>(JSONResponse);

            //var x = data["clientResponsePayload.orchestrationDecisions.sequenceId"].Value<string>();

            var x = data["clientResponsePayload"]?["orchestrationDecisions"]?[0]?["sequenceId"]?.Value<string>();

            Console.WriteLine(x == null);

            Console.WriteLine(x);

            Assert.AreEqual("1", x);

        }   

        static string GetJson()

        {

            return @"{

    ""responseHeader"": {

        ""requestType"": ""PreciseIdOnly"",

        ""clientReferenceId"": ""21321"",

        ""expRequestId"": ""213213"",

        ""messageTime"": ""2020-05-28T00:00:02Z"",

        ""overallResponse"": {

            ""decision"": ""REFER"",

            ""decisionText"": ""Continue & Investigate"",

            ""decisionReasons"": [

                ""Continue & Investigate""

            ],

            ""recommendedNextActions"": [],

            ""spareObjects"": []

        },

        ""responseCode"": ""R123"",

        ""responseType"": ""INFO"",

        ""responseMessage"": ""Workflow Complete."",

        ""tenantID"": ""V123242""

    },

    ""clientResponsePayload"": {

        ""orchestrationDecisions"": [

            {

                ""sequenceId"": ""1"",

                ""decisionSource"": ""PreciseId"",

                ""decision"": ""REFER"",

                ""decisionReasons"": [

                    ""Continue & Investigate""

                ],

                ""score"": 737,

                ""decisionText"": ""Continue & Investigate"",

                ""nextAction"": ""Continue"",

                ""appReference"": ""22222"",

                ""decisionTime"": ""2020-05-28T18:58:43Z""

            }

        ]

    }

}

";

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());

            Console.WriteLine("{0} version: {1}", typeof(JsonSerializer).Assembly.GetName().Name,  typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

        public static string GetNetCoreVersion()

        {

            //https://techblog.dorogin.com/how-to-detect-net-core-version-in-runtime-ecd65ad695be

            //

            var assembly = typeof(System.Runtime.GCSettings).GetTypeInfo().Assembly;

            var assemblyPath = assembly.CodeBase.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);

            int netCoreAppIndex = Array.IndexOf(assemblyPath, "Microsoft.NETCore.App");

            if (netCoreAppIndex > 0 && netCoreAppIndex < assemblyPath.Length - 2)

                return assemblyPath[netCoreAppIndex + 1];

            return null;

        }

    }

​