using System;

using JsonSubTypes;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        string json = @"{

  ""discriminator"": ""SubTypeOrder"",

  ""DateTime"": ""2011-09-14T00:00:00-04:00"",

  ""DateTimeOffset"": ""2011-09-14T00:00:00-04:00""

}";

        var subtype = JsonConvert.DeserializeObject<OrderBase>(json);

        var stock = JsonConvert.DeserializeObject<Order>(json);

        Console.WriteLine(((SubTypeOrder)subtype).DateTime);

        Console.WriteLine(stock.DateTime);

        Console.WriteLine(((SubTypeOrder)subtype).DateTimeOffset);

        Console.WriteLine(stock.DateTimeOffset);

        Console.WriteLine("---------------------");

        var settings = new JsonSerializerSettings() { DateParseHandling = DateParseHandling.DateTimeOffset };

        subtype = JsonConvert.DeserializeObject<OrderBase>(json, settings);

        stock = JsonConvert.DeserializeObject<Order>(json, settings);

        Console.WriteLine(((SubTypeOrder)subtype).DateTime);

        Console.WriteLine(stock.DateTime);          

        Console.WriteLine(((SubTypeOrder)subtype).DateTimeOffset);

        Console.WriteLine(stock.DateTimeOffset);        

    }

}

​

    [JsonConverter(typeof(JsonSubtypes), "discriminator")]

    [JsonSubtypes.KnownSubType(typeof(SubTypeOrder), "SubTypeOrder")]

    public class OrderBase

    {

    }

​

    public class SubTypeOrder : OrderBase

    {

        public DateTime DateTime { get; set; }

        public DateTimeOffset DateTimeOffset { get; set; }  

    }

    public class Order

    {

        public DateTime DateTime { get; set; }

        public DateTimeOffset DateTimeOffset { get; set; }      

    }