using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

using System.Reflection;

​

using System.Text.Json;

using System.Text.Json.Serialization;

​

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

​

//https://stackoverflow.com/questions/58271901/converting-newtonsoft-code-to-system-text-json-in-net-core-3-whats-equivalent

​

    public class ResponseJson

    {

        [JsonPropertyName("status")]

        public bool Status { get; set; }

        [JsonPropertyName("message")]

        public string Message { get; set; }

        [JsonPropertyName("Log_id")]

        public string LogId { get; set; }

        [JsonPropertyName("Log_status")]

        public string LogStatus { get; set; }

​

        public string FailureReason { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var response = new ResponseJson

            {

                Status = true, 

                Message = "my message",

                LogId = "my log id",

                LogStatus = "my log status",

                FailureReason = "my failure reason"

            };

            var options = new JsonSerializerOptions

            {

                WriteIndented = false,

            };

            var json = JsonSerializer.Serialize(response, options);

​

            Console.WriteLine("Serialized {0}", response);

            Console.WriteLine(json);

            Console.WriteLine("\nParsing JSON using JsonDocument.Parse:");

            //https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-8#using-declarations 

            using var doc = JsonDocument.Parse(json);

            var names = doc.RootElement.EnumerateObject().Select(p => p.Name);

            Console.WriteLine("Property names: {0}", string.Join(",", names)); // Property names: status,message,Log_id,Log_status,FailureReason

            using var ms = new MemoryStream();

            using (var writer = new Utf8JsonWriter(ms, new JsonWriterOptions { Indented = true }))

            {

                doc.WriteTo(writer);

            }

            var json2 = Encoding.UTF8.GetString(ms.GetBuffer(), 0, checked((int)ms.Length));

            Console.WriteLine(json2);

        }   

    }

​

​

    public class Program

    {

        public static void Main()

        {

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

            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;

        }

    }

​