using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        TimeZone zone = TimeZone.CurrentTimeZone;

        // Get offset.

        TimeSpan offset = zone.GetUtcOffset(DateTime.Now);

        Console.WriteLine($"CurrentTimeZone: {offset}");

        DateTime.Now.DumpDt("1");

        DateTime.Parse("2017-12-28T14:29:12.899Z").DumpDt("2");

        DateTime.Parse("12-18-2017 14:29:12.899 AM").DumpDt("2");

    }

}

​

    static class Ext {

        public static void DumpDt(this DateTime dt, string lbl) {

            Console.WriteLine($"[{lbl}] {dt} => Kind: {dt.Kind}, IsDaylightSavingTime: {dt.IsDaylightSavingTime()}, UTC: {dt.ToUniversalTime()}, Local: {dt.ToLocalTime()}");

        }

    }