using System;

using Newtonsoft.Json;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var list = GetList();

        var baselist = new List<SubscriptionBase>();

        baselist.AddRange(list);

        var single = baselist.FirstOrDefault();

​

        dynamic singledynamic = baselist.FirstOrDefault();

        //var test2 = single.Sims //not work :)

        var test1 = singledynamic.Sims; //will work because of dynamic binding

        Console.WriteLine(JsonConvert.SerializeObject(test1));

        //Console.WriteLine(JsonConvert.SerializeObject(test2));

        Console.WriteLine(JsonConvert.SerializeObject(baselist));

    }

    public static List<SubscriptionBase> GetList()

    {

        var mobileList = new List<SubscriptionBase>();

        mobileList.Add(new MobileSubscription

                       {

                           Description = "Desc",

                           Id = "test",

                           Sims = "tst"

                       });

        return mobileList;

    }

}

​

    public class SubscriptionBase

    {

             [JsonProperty("description")]

        public string Description { get; set; }

​

        [JsonProperty("id")]

        public string Id { get; set; }

​

        [JsonProperty("isOwner")]

        public bool IsOwner { get; set; }

​

        [JsonProperty("name")]

        public string Name { get; set; }

​

        [JsonProperty("type")]

        public virtual SubscriptionType Type { get; }

    }

    public sealed class MobileSubscription : SubscriptionBase

    {

        public string Sims { get; set; }

​

        [JsonProperty("type")]

        public override SubscriptionType Type { get; } = SubscriptionType.MOBILE;

    }

    public enum SubscriptionType

    {

        Default,

        MOBILE,

        BROADBAND,

        TV

    }