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/67350290/how-to-add-indentation-in-writerawvalue-in-custom-jsonconverter

​

    public interface IJsonProperty<TModel>

    {

        public object Data { get; set; }

    }

​

    public class JsonProperty<TModel> : IJsonProperty<TModel>

    {

        public object Data { get; set; }

    }

​

    public class IJsonPropertyConverter<TModel> : JsonConverter<IJsonProperty<TModel>>

    {

        public override void WriteJson(JsonWriter writer, IJsonProperty<TModel> value, JsonSerializer serializer) =>

            writer.WriteFormattedRawValue((string)value.Data);

        public override IJsonProperty<TModel> ReadJson(JsonReader reader, Type objectType, IJsonProperty<TModel> existingValue, bool hasExistingValue, JsonSerializer serializer)

            => throw new NotImplementedException();

    }

​

    public static class JsonExtensions

    {

        public static void WriteFormattedRawValue(this JsonWriter writer, string json, DateParseHandling dateParseHandling = DateParseHandling.None, FloatParseHandling floatParseHandling = default)

        {

            if (json == null)

                writer.WriteRawValue(json);

            else

                using (var reader = new JsonTextReader(new StringReader(json)) { DateParseHandling = dateParseHandling, FloatParseHandling = floatParseHandling })

                    writer.WriteToken(reader);

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var model = new JsonProperty<object>

            {

                Data = GetJson(),

            };

            var settings = new JsonSerializerSettings

            {

                Converters = { new IJsonPropertyConverter<object>() }

            };

            var json1 = JsonConvert.SerializeObject(model, Formatting.Indented);

            Console.WriteLine("Json without converter:");

            Console.WriteLine(json1);

            Console.WriteLine("Json with converter:");

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

            Console.WriteLine(json2);

        }   

        static string GetJson() => JToken.Parse(@"{

    ""glossary"": {

        ""title"": ""example glossary"",

        ""GlossDiv"": {

            ""title"": ""S"",

            ""GlossList"": {

                ""GlossEntry"": {

                    ""ID"": ""SGML"",

                    ""SortAs"": ""SGML"",

                    ""GlossTerm"": ""Standard Generalized Markup Language"",

                    ""Acronym"": ""SGML"",

                    ""Abbrev"": ""ISO 8879:1986"",

                    ""GlossDef"": {

                        ""para"": ""A meta-markup language, used to create markup languages such as DocBook."",

                        ""GlossSeeAlso"": [""GML"", ""XML""]

                    },

                    ""GlossSee"": ""markup""

                }

            }

        }

    }

}").ToString(Formatting.None);

    }

​

    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;

        }

    }

​