using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        TopupDTO temp = new TopupDTO();

        JObject ob = JObject.FromObject(temp);

        var count = new List<int>{1, 2, 3, 4};

        foreach (var item in count)

        {

            if (item == 3) break;

        Console.WriteLine(item);

        }

    }

    public class TopupDTO{

        public string TopupID { get; set; }

        public int TelcoID { get; set; }

        public bool IsUsed { get; set; }

        public TopupDTO() {

            TopupID = "id";

            TelcoID = 1;

            IsUsed = true;

        }

    }

}