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/59653407/jobject-parser-stops-executing-without-giving-any-output-or-error/59653632#59653632

​

    class TestClass

    {

        public static void Test()

        {

            var _pid = GetJson();

            TestJToken(_pid);

            TestJArray(_pid);

        }   

        static void TestJToken(string _pid)

        {

            var pid = JToken.Parse(_pid).SelectToken("[0].person_id")?.ToString();

            Console.WriteLine("pid = {0}", pid);

            Assert.IsTrue(pid == "1141");

        }

        static void TestJArray(string _pid)

        {

            var pid = JArray.Parse(_pid)[0]?["person_id"]?.ToString();

            Console.WriteLine("pid = {0}", pid);

            Assert.IsTrue(pid == "1141");

        }

        static string GetJson()

        {

            var json = @"[{""person_id"":1141,

""person_fname"":""Tony"",

""person_lname"":""Stark"",

""person_initials"":""IM"",

""person_mono"":""1234567890"",

""person_pemail"":""tonys@gmail.com"",

""status"":""0"",

""db_tstamp"":""2020-01-08T22:03:08.9659938""}]

";

            return json;

        }

    }

​

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("Json.NET version: " + 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;

        }

    }

​