using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var foo = new Foo

        {

            Data = new[] { 1, 2, 3, 4, 5}

        };

        var ser = JsonConvert.SerializeObject(foo);

        var des = JsonConvert.DeserializeObject<Foo>(ser);

        Console.WriteLine(des.Data);

    }

    public class Foo

    {

        public IList<int> Data {get;set;}

    }

}