using System;

using Newtonsoft.Json;

using System.Xml.Serialization;

using Newtonsoft.Json.Converters;

public class Program

{

    public static void Main()

    {               

        DateTime d;

        DateTime.TryParse("2017-08-04T14:19:30.730Z", out d);

        Console.WriteLine();

        Console.WriteLine(d.Kind);

        /*

        Print(DateTime.Now);

        Print(Convert.ToDateTime("2017-08-04 14:19:30.730"));

        Print(Convert.ToDateTime("2017-08-04 14:19:30.731"));

        */      

    }

    private static void Print(DateTime date)

    {

        var d = new Demo();

        d.StartedAt = date.ToUniversalTime();

        var json = JsonConvert.SerializeObject(d);

        Console.WriteLine(json);

    }

    public class Demo 

    {

        [XmlAttribute(AttributeName = "startedAt")]

        [JsonProperty("startedAt")]

        //[JsonConverter(typeof(DateFormatConverter), "yyyy-MM-ddTHH:mm:ssZ")]

        public DateTime StartedAt {get;set;}

    }

    public class DateFormatConverter : IsoDateTimeConverter

    {

        public DateFormatConverter(string format)

        {

            DateTimeFormat = format;

        }

    }

}