using System;

using System.Collections.Concurrent;

using Newtonsoft.Json;      

public class Program

{

    public static void Main()

    {

         ConcurrentDictionary<(int,int), (double,int)> scoreDir = new ConcurrentDictionary<(int,int), (double,int)>();

        scoreDir.TryAdd((1,2),(0.9,3));

         string jsonString = JsonConvert.SerializeObject(scoreDir);

        Console.WriteLine(jsonString);

    }

}