using System;

using System.Linq;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        string jsonContent = "[{\"fields\":[[\"name\",\"value\",\"values\",\"error\"],[\"correspondsApi\",\"N\",null,\"\"],[\"username\",\"test@test.com\",null,\"\"],[\"password\",\"\",null,\"\"],[\"accountid\",\"\",null,\"\"],[\"rememberMe\",\"Y\",null,\"\"],[\"language\",\"en-US\",null,\"\"],[\"S\",\"tokenValue\",null,null],[\"authToken\",\"\",null,\"\"]], \"success\":\"Y\",\"message\":\"Access is granted\"}]";

            JsonConvert.DeserializeObject<List<MyArray>>(jsonContent);

    }

}

​

public class MyArray

    {

        public List<List<string>> fields { get; set; }

        public string success { get; set; }

        public string message { get; set; }

    }

​

    public class Root

    {

        public List<MyArray> MyArray { get; set; }

    }