using System;

using Newtonsoft.Json;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var tmp = new 

        {

            firstElement = 0,

            firstDictionary = new Dictionary<string, object> { {"reference","AH-8989-567-90" }, {"reference2","AH-8989-567-90" }}

        };

        Console.WriteLine("Hello World" + JsonConvert.SerializeObject(tmp));

    }

}