using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public enum SecurityType {

        First = 1

    }

    public class State{  

        public Dictionary<SecurityType, List<long>> assets { get; set; }

    }

    public static void Main()

    {

        var state = JsonConvert.DeserializeObject<State>(@"{assets :{""1"":[]}}");

        Console.WriteLine(state.assets[SecurityType.First].Count);

    }

}