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/69902915/how-to-serializeobject-which-contains-string-value-stored-in-binarydata

​

    public class BinaryDataConverter : JsonConverter<BinaryData>

    {

        public override BinaryData ReadJson(JsonReader reader, Type objectType, BinaryData existingValue, bool hasExistingValue, JsonSerializer serializer) =>

            serializer.Deserialize<byte []>(reader) switch

            {

                null => null,

                var a => new BinaryData(a),

            };

​

        public override void WriteJson(JsonWriter writer, BinaryData value, JsonSerializer serializer) =>

            // For performance we avoid calling ToArray() (which copies the internal ReadOnlyMemory<byte> _bytes;) and use the implicit operator casting BinaryData to ReadOnlyMemory<byte>

            writer.WriteValue(Convert.ToBase64String(value));  

    }

​

    class TestClass

    {

        public static void Test()

        {

            Test(null);

            Test(new BinaryData("hello"));

            Test(new BinaryData(Enumerable.Range(0, 1000).Select(i => unchecked((byte)i)).ToArray()));

        }   

        public static BinaryData Test(BinaryData data)

        {

            var settings = new JsonSerializerSettings

            {

                Converters = { new BinaryDataConverter() },

            };

            // Add in some comments for testing purposes, to make sure they don't mess up the converter.

            var json = "/* Some Comment */" + JsonConvert.SerializeObject(data, settings) + "/* Some Comment */";

​

            Console.WriteLine(json);

            var data2 = JsonConvert.DeserializeObject<BinaryData>(json, settings);

            if (data == null)

                Assert.AreEqual(null, data2);

            else

                Assert.IsTrue(data.ToArray().SequenceEqual(data2.ToArray()));

            return data2;

        }   

    }

​

    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;

        }

    }

​