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/67889053/is-there-a-way-to-access-customparameters-object-from-within-a-custom-jsonconv

​

    public class ComponentModel

    {

    }

​

    public class Root

    {

        [JsonProperty("components",

                      ItemConverterType = typeof(ComponentConverter), 

                      ItemConverterParameters = new object [] { "custom_string_value" })]

        public List<ComponentModel> Components { get; set; }

    }

    public class ComponentConverter : JsonConverter

    {   

        public string CustomString { get; init; }

​

        public ComponentConverter(string customString)

        {

            // Remember the converter parameters for use in WriteJson() and ReadJson()

            this.CustomString = customString;

        }

​

        public override bool CanConvert (Type t) => t == typeof(ComponentModel);

​

        public override void WriteJson (JsonWriter writer, object value, JsonSerializer serializer)

        {

            // Customize the serialized contents using the CustomString passed in to the constructor

            writer.WriteValue(CustomString);

        }

        public override object ReadJson (JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

        {

            // ...

            throw new NotImplementedException();

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var model = new Root

            {

                Components = new() { new ComponentModel() },

            };

            var json = JsonConvert.SerializeObject(model);

            Console.WriteLine(json);

        }   

    }

​

    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.Location.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;

        }

    }

​