using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var config = @"

        [

    { text: '', value: undefined },

    { text: 'Standardowe SLA', value: 1 },

    { text: 'Realizacja w trybie a vista', value: 2 }

  ]

        ";

        var result = 

        var list = new List<string>

            {

                "User",

                "Admin"

            };

        Account account = new Account

        {

            Email = "james@example.com",

            Active = true,

            CreatedDate = new DateTime(2013, 1, 20, 0, 0, 0, DateTimeKind.Utc),

            Roles = list,

            Roles2 = JsonConvert.SerializeObject(list)

        };

​

        string json = JsonConvert.SerializeObject(account, Formatting.Indented);

        Console.WriteLine(json);

        var a = JsonConvert.DeserializeObject<Account>(json);

        Console.WriteLine(a.Roles2);

        var l = JsonConvert.DeserializeObject<List<string>>(a.Roles2);

        var empty = JsonConvert.DeserializeObject<Account>(string.Empty);

        Console.WriteLine(string.Format("EMPTY: {0}", empty));

        var x = JsonConvert.DeserializeObject<Account>(null);

        Console.WriteLine(string.Format("NULL: {0}", x));

    }

}

​

public class Account

{

    public string Email { get; set; }

    public bool Active { get; set; }

    public DateTime CreatedDate { get; set; }

    public IList<string> Roles { get; set; }

    public string Roles2 { get; set; }

}

​