using System;

using System.Linq;

using Newtonsoft.Json.Linq;

​

namespace ConsoleApplication1

{

    public class Program

    {

        public static void Main()

        {

            try

            {

                const string output = @"{""champions"": [  {

    ""id"": 40,

    ""stats"": 

    {

        ""totalSessionsPlayed"": 10,

        ""totalSessionsLost"": 8,

        ""totalSessionsWon"": 2,

    }  

},

{    

    ""id"": 6,

    ""stats"":

    {      

        ""totalSessionsPlayed"": 3,

        ""totalSessionsLost"": 2,

        ""totalSessionsWon"": 1, 

    }  

}

]}";

​

                var objectRankedStats = JObject.Parse(output)["champions"];

​

                var champ = objectRankedStats.FirstOrDefault(jt => (int)jt["id"] == 6);

​

                Console.WriteLine(champ);

            }

            catch (Exception e)

            {

                Console.WriteLine(e);

            }

        }

    }

}

​