using System;

using System.Text.Json;

using System.Text.Json.Serialization;

using System.Collections.Generic;

using Newtonsoft.Json;

​

public class Program

{

    const string json = "{\"diff1\": {\"diffMultiplier\": 2,\"color\": \"yellow\"}, \"diff2\": { \"diffMultiplier\": 1, \"color\": \"green\"}}";

    public static void Main()

    {

        DeserializeAndSerializeBackNewtosonft();

        DeserializeAndSerializeBackSystemTextJson();

    }

​

    private static void DeserializeAndSerializeBackSystemTextJson()

    {

        var options = new JsonSerializerOptions{WriteIndented = true};

        var dictionary = System.Text.Json.JsonSerializer.Deserialize<Dictionary<string, Dictionary<string, object>>>(json, options);

        Console.WriteLine(dictionary["diff1"]["color"]);

        var backToJson = System.Text.Json.JsonSerializer.Serialize(dictionary, options);

        Console.WriteLine(backToJson);

    }

​

    private static void DeserializeAndSerializeBackNewtosonft()

    {

        var dictionary = JsonConvert.DeserializeObject<Dictionary<string, Dictionary<string, object>>>(json);

        Console.WriteLine(dictionary["diff1"]["color"]);

        var backToJson = JsonConvert.SerializeObject(dictionary, Formatting.Indented);

        Console.WriteLine(backToJson);

    }

}