Polymorphic serialization/deserialization using System.Text.Json

Example.cs

using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace Poly
{
    public abstract class BaseClass
    {
        public string Hello { get; } = "Hello";
    }

    public class WorldClass : BaseClass
    {
        public string World { get; } = "World";
    }

    public class GoodbyeClass : BaseClass
    {
        public string Bye { get; } = "Bye";
    }

    public sealed class PolyFake
    {
        public PolyFake(string fullType, object target)
        {
            this.FullType = fullType;
            this.Target = target;
        }

        public string FullType { get; }
        public object Target { get; }
    }

    public sealed class BaseClassConverter<T> : JsonConverter<T>
    {
        public override bool CanConvert(Type typeToConvert)
        {
            return typeof(T) == typeToConvert;
        }

        public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            // Reader needs to deseralize the polyclass, get the type from FullType, then deserialize the inner section as that specific type and return that, its as if the wrapper class was never there
            throw new NotImplementedException();
        }
        public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
        {
            var polyFake = new PolyFake(value.GetType().FullName, value);
            //writer.WriteStartObject("polyFake");
            JsonSerializer.Serialize(writer, polyFake, options);
            //writer.WriteEndObject();
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var list = new List<BaseClass>()
            {
                new WorldClass(),
                new GoodbyeClass(),
            };


            var options = new JsonSerializerOptions();
            options.Converters.Add(new BaseClassConverter<BaseClass>());
            var text = JsonSerializer.Serialize(list, options);

            Console.WriteLine("Plain:\n" + text);

            Console.ReadLine();
        }
    }
}