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/73481576/json-net-deserializing-dictionaries-whose-format-or-constructor-might-have-chang

​

public class GenericDictionary<TKey, TValue> : Dictionary<TKey, TValue>

{

}

​

namespace V1

{

    public class Data

    {

        public GenericDictionary<string, double> currentResources = new GenericDictionary<string, double>();

        public Data()

        {

            currentResources.Add("EXP", 0);

            currentResources.Add("Credits", 0);

        }

    }

}

​

namespace V2

{

    public class Data

    {

        public GenericDictionary<string, double> currentResources = new GenericDictionary<string, double>();

        public Data()

        {

            currentResources.Add("EXP", 0);

            currentResources.Add("Credits", 0);

            currentResources.Add("Apples", 0);

        }

    }

}

​

    class TestClass

    {

        public static void Test()

        {

            var v1 = new V1.Data();

            v1.currentResources["Credits"] = 101.1;

            var json1 = JsonConvert.SerializeObject(v1);

            Console.WriteLine("Old JSON:");

            Console.WriteLine(json1);

            var v2 = JsonConvert.DeserializeObject<V2.Data>(json1);

            Console.WriteLine("\nDeserialized {0}:", v2);

            Console.WriteLine(JsonConvert.SerializeObject(v2));

            v2.currentResources.Dump();

            Assert.That(v2.currentResources.ContainsKey("Apples"));

            Assert.That(new V2.Data().currentResources.Keys.All(k => v2.currentResources.ContainsKey(k)));

        }   

    }

​

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version);

            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;

            }

        }

    }

​