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/67420877/c-sharp-newtonsoft-json-custom-deserializer

​

    class Customer {

        public string CustomerID { get; set; }

        public string CustomerCurrencyID { get; set; }

    }

​

    public class WrapWithValueConverter<TValue> : JsonConverter

    {

        // Here we take advantage of the fact that a converter applied to a property has highest precedence to avoid an infinite recursion.

        class DTO { [JsonConverter(typeof(NoConverter))] public TValue value { get; set; } public object GetValue() => value; }

​

        public override bool CanConvert(Type objectType) => typeof(TValue).IsAssignableFrom(objectType);

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

            => serializer.Serialize(writer, new DTO { value = (TValue)value });

​

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

            => serializer.Deserialize<DTO>(reader)?.GetValue();

    }

​

    public class NoConverter : JsonConverter

    {

        // NoConverter taken from this answer https://stackoverflow.com/a/39739105/3744182

        // By https://stackoverflow.com/users/3744182/dbc

        // To https://stackoverflow.com/questions/39738714/selectively-use-default-json-converter

        public override bool CanConvert(Type objectType)  { throw new NotImplementedException(); /* This converter should only be applied via attributes */ }

        public override bool CanRead => false;

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) => throw new NotImplementedException();

        public override bool CanWrite => false;

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) => throw new NotImplementedException();

    }

​

    class TestClass

    {

        public static void Test()

        {

            var json = GetJson();

            var settings = new JsonSerializerSettings

            {

                Converters = { new WrapWithValueConverter<string>() },

            };

            var model = JsonConvert.DeserializeObject<Customer>(json, settings);

            model.Dump();

​

            Assert.AreEqual("USD", model.CustomerCurrencyID);

            Assert.AreEqual("EXAMPLE", model.CustomerID);

            var json2 = JsonConvert.SerializeObject(model, Formatting.Indented, settings);

            Console.WriteLine(json2);

            Assert.IsTrue(JToken.DeepEquals(JToken.Parse(json), JToken.Parse(json2)));

        }   

        static string GetJson()

        {

            return @"{

    ""CustomerID"": {

        ""value"": ""EXAMPLE""

    },

    ""CustomerCurrencyID"": {

        ""value"": ""USD""

    }

}

";

        }

    }

​

    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;

        }

    }

​