using System;

using System.Collections.Concurrent;

using System.Xml.Serialization;

using System.IO;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var dict = CreateDictionary();

        FillDemoData(dict);

        var xml = SerializeDictionary(dict);

        Console.WriteLine(xml);

        var deserializedDict = JsonConvert.DeserializeObject<ConcurrentDictionary<string, string>>(xml);

        Console.WriteLine(deserializedDict["key1"]);

        Console.WriteLine(deserializedDict["key2"]);

        Console.WriteLine(deserializedDict["key3"]);

        Console.WriteLine(deserializedDict["key4"]);

    }

    public static ConcurrentDictionary<string, string> CreateDictionary()

    {

        var concurrentDict = new ConcurrentDictionary<string, string>();

        return concurrentDict;

    }

    public static void FillDemoData(ConcurrentDictionary<string, string> d)

    {

        d.TryAdd("key1", "value1");

        d.TryAdd("key2", "value2");

        d.TryAdd("key3", "value3");

        d.TryAdd("key4", "value4");

    }

    public static string SerializeDictionary(ConcurrentDictionary<string, string> d)

    {

        return JsonConvert.SerializeObject(d);

    }

}