using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Net;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

namespace JSONTest

{

    public class Program

    {

        public static void Main(string[] args)

        {

            WebClient c = new WebClient();

            var data = c.DownloadString("https://blockchain.info/ticker");

            JObject currencies = JObject.Parse(data);

            var currency = currencies.SelectToken("USD");           

            Console.WriteLine(currency);           

        }

    }

}