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/52671471/custom-json-net-converter-should-not-serialize-a-property

​

    [Flags]

    public enum SampleEnum

    {

        None = 0,

        ValueA = 2,

        ValueB = 4

    }

    public class SerializedClass

    {

        [JsonProperty(DefaultValueHandling = DefaultValueHandling.Ignore)]

        [JsonConverter(typeof(ArrayEnumConverter))]

        public SampleEnum SampleEnum { get; set; }

    }

​

    public class ArrayEnumConverter : StringEnumConverter

    {

        // A dummy class for purposes of testing.

    }

​

    class TestClass

    {

        public static void Test()

        {

            Test(SampleEnum.None);

            Test(SampleEnum.ValueA);

            Test(SampleEnum.ValueA | SampleEnum.ValueB);

            Test(SampleEnum.ValueB);

        }

        static void Test(SampleEnum sample)

        {

            var root = new SerializedClass

            {

                SampleEnum = sample,

            };

            Console.WriteLine("\nJson for SampleEnum={0}: ", sample);

            Console.WriteLine(JsonConvert.SerializeObject(root));

        }

    }

​

    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;

            }

        }

    }

​