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 System.Text.Json;

using System.Text.Json.Serialization;

​

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

​

//https://stackoverflow.com/questions/59719751/operation-is-not-valid-due-to-the-current-state-of-the-object-system-text-json

​

    public class JsonApiMessage

    {

        [JsonPropertyName("data")]

        public JsonApiData Data { get; set; }

​

        [JsonPropertyName("included")]

        public JsonApiData [] Included { get; set; }

    }

​

    public class JsonApiData

    {

        [JsonPropertyName("type")]

        public string Type { get; set; }

​

        [JsonPropertyName("id")]

        public string Id { get; set; }

​

        [JsonPropertyName("attributes")]

        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]

        public JsonElement Attributes { get; set; }

​

        [JsonPropertyName("meta")]

        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]

        public JsonElement Meta { get; set; }

​

        [JsonPropertyName("relationships")]

        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]

        public JsonElement Relationships { get; set; }

    }

    class TestClass

    {

        public static void Test()

        {

            var payloadString = CreatePayloadString();

            Console.WriteLine("\npayloadString:");

            Console.WriteLine(payloadString);

​

            var payload = JsonSerializer.Deserialize<JsonApiMessage>(payloadString);

​

            Guid messageID = Guid.NewGuid();

            payload.Data.Id = messageID.ToString();         

            var reserialisedPayload  = JsonSerializer.Serialize(payload, new JsonSerializerOptions { IgnoreNullValues = true });

            Console.WriteLine("\nRe-serialized {0}:", nameof(reserialisedPayload));

            Console.WriteLine(reserialisedPayload);

        }   

        static string CreatePayloadString()

        {

            return @"{

  ""data"": {

    ""type"": ""test"",

    ""attributes"": {

      ""source"": ""postman"",

      ""instance"": ""jg"",

      ""level"": ""INFO"",

      ""null test"": null,

      ""message"": ""If this comes back with an ID, the API is probably working""

    }

  }

}";

        }

    }

​

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("System.Text.Json 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;

        }

    }

​