using System;

using Newtonsoft.Json;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        var myc = new Words();

        myc["jeden"] = "first word";

        myc["dwa"] = "twice word";

        var serialize = JsonConvert.SerializeObject(myc);

        var deserialize = JsonConvert.DeserializeObject<Words>(serialize);

        Console.WriteLine(deserialize.ToString());

    }

    public class Words: Dictionary<string,string>

    {

        public override string ToString()

        {

            var ret = "";

            foreach(var kvp in this)

            {

                ret = $"{kvp.Key} - {kvp.Value}\n";

            }

            return ret;

        }

    }

}