https://stackoverflow.com/questions/62079961/why-does-jsonconvert-treat-default-constructors-and-other-constructors-inherentl

CSharp · Console

/Program.cs

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/62079961/why-does-jsonconvert-treat-default-constructors-and-other-constructors-inherentl

	[JsonObject(IsReference = true)]
	public class Scenario
	{
        // Remainder unchanged
	}

	public class ReferenceTesting
	{
		public List<Scenario> scenarios = new List<Scenario>();
		private Dictionary<Scenario, float> _Dict = new Dictionary<Scenario, float>();

		public KeyValuePair<Scenario, float> [] SerializedDict
		{
			get { return _Dict.ToArray(); }
			set { _Dict = value.ToDictionary(x => x.Key, x => x.Value);  }
		}

		public ReferenceTesting() : this(0) { }
		
		public ReferenceTesting(int number = 0)
		{
			for (int i = 0; i < number; i++)
			{
				Scenario s1 = new Scenario();
				scenarios.Add(s1);
				_Dict.Add(s1, i);
			}
		}
		public override string ToString()
		{
			string s = "";
			for (int i = 0; i < scenarios.Count; i++)
			{
				Scenario scenario = scenarios[i];
				s += $"scenario{i} \n";
			}
			foreach (KeyValuePair<Scenario, float> scenario in SerializedDict)
			{
				s += $"Key: {scenario.Key}, Value: {scenario.Value} \n";
			}
			return s;
		}
	}

    class TestClass
    {
        public static void Test()
        {
			var test = new ReferenceTesting(3);
			
			foreach (var item in test.SerializedDict.Select(p => p.Key))
				Assert.IsTrue(test.scenarios.Contains(item));
			
			var json = JsonConvert.SerializeObject(test, Formatting.Indented);
			
			Console.WriteLine(json);
			
			var test2 = JsonConvert.DeserializeAnonymousType(json, test);
			
			Console.WriteLine("Deserialized {0}:", test2.GetType());
			Console.WriteLine(test2);
			
			foreach (var item in test2.SerializedDict.Select(p => p.Key))
				Assert.IsTrue(test2.scenarios.Contains(item));
			
			Assert.IsTrue(test.SerializedDict.Length == test2.SerializedDict.Length);
			Assert.IsTrue(test.scenarios.Count == test2.scenarios.Count);
		}	
	}

	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.CodeBase.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;
		}
	}