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 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/29719509/json-net-throws-stackoverflowexception-when-using-jsonconvert

​

    public class FJson : JsonConverter

    {

        [ThreadStatic]

        static bool disabled;

​

        // Disables the converter in a thread-safe manner.

        bool Disabled { get { return disabled; } set { disabled = value; } }

​

        public override bool CanWrite { get { return !Disabled; } }

​

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

        {

            JToken t;

            using (new PushValue<bool>(true, () => Disabled, (canWrite) => Disabled = canWrite))

            {

                t = JToken.FromObject(value, serializer);

            }

​

            if (t.Type != JTokenType.Object)

            {

                t.WriteTo(writer);

                return;

            }

​

            JObject o = (JObject)t;

            writer.WriteStartObject();

            WriteJson(writer, o);

            writer.WriteEndObject();

        }

​

        private void WriteJson(JsonWriter writer, JObject value)

        {

            foreach (var p in value.Properties())

            {

                if (p.Value is JObject)

                    WriteJson(writer, (JObject)p.Value);

                else

                    p.WriteTo(writer);

            }

        }

​

        public override object ReadJson(JsonReader reader, Type objectType,

           object existingValue, JsonSerializer serializer)

        {

            throw new NotImplementedException();

        }

​

        public override bool CanConvert(Type objectType)

        {

            return true; // works for any type

        }

    }

​

    public struct PushValue<T> : IDisposable

    {

        Action<T> setValue;

        T oldValue;

​

        public PushValue(T value, Func<T> getValue, Action<T> setValue)

        {

            if (getValue == null || setValue == null)

                throw new ArgumentNullException();

            this.setValue = setValue;

            this.oldValue = getValue();

            setValue(value);

        }

​

        #region IDisposable Members

​

        // By using a disposable struct we avoid the overhead of allocating and freeing an instance of a finalizable class.

        public void Dispose()

        {

            if (setValue != null)

                setValue(oldValue);

        }

​

        #endregion

    }

​

    [JsonConverter(typeof(FJson))]

    public class A

    {

        public A()

        {

            this.b = new B();

        }

​

        public int id { get; set; }

        public string name { get; set; }

​

        [JsonConverter(typeof(BConverter))]

        public B b { get; set; }

    }

​

    public class B

    {

        public string name { get; set; }

    }

​

    public class BConverter : JsonConverter

    {

        [ThreadStatic]

        static bool disabled;

​

        // Disables the converter in a thread-safe manner.

        bool Disabled { get { return disabled; } set { disabled = value; } }

​

        public override bool CanWrite { get { return !Disabled; } }

​

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

        {

            JToken t;

            using (new PushValue<bool>(true, () => Disabled, (canWrite) => Disabled = canWrite))

            {

                t = JToken.FromObject(value, serializer);

            }

​

            var obj = (JObject)t;

            obj["BConverterCalled"] = true;

            obj.WriteTo(writer);

        }

​

        public override bool CanConvert(Type objectType)

        {

            throw new NotImplementedException();

        }

​

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

        {

            throw new NotImplementedException();

        }

    }

​

    public class TestClass

    {

        public static void Test()

        {

            A a = new A();

            a.id = 1;

            a.b.name = "value";

​

            var jsonFormatted = JsonConvert.SerializeObject(a, Formatting.Indented);

            Console.WriteLine(jsonFormatted);

            var json = JsonConvert.SerializeObject(a, Formatting.None);

            Assert.IsTrue(json == "{\"id\":1,\"name\":null,\"name\":\"value\",\"BConverterCalled\":true}");

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: " + Environment.Version);

            Console.WriteLine("Json.NET version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​