using System;

using System.Globalization;

using NodaTime;

using System.Xml;

public class Program

{

    public static void Main()

    {

        var now = DateTime.UtcNow;

        Console.WriteLine("Hello World");

        var t = TimeZoneInfo .FindSystemTimeZoneById("en-US");

        Console.WriteLine(t);

        var userTimeZoneInfo = TimeZoneInfo.CreateCustomTimeZone("PSTuuu",TimeSpan.FromHours(-5),"s","Oac");

        //Console.WriteLine(userTimeZoneInfo.IsInvalidTime(DateTime.Now));

    //  Console.WriteLine( userTimeZoneInfo.IsDaylightSavingTime(now)) ;

            //Console.WriteLine( userTimeZoneInfo.IsDaylightSavingTime(now.AddMonths(9))) ;

    //  var dateTimeZone = DateTimeZoneProviders.Tzdb[zoneID];

        //var inst = Instant.FromDateTimeUtc(yourDateTime);

//var dz = new ZonedDateTime(inst, dateTimeZone);

        var s =TimeZoneInfo.ConvertTimeFromUtc(now,

                    userTimeZoneInfo).ToString("g", CultureInfo.CurrentUICulture);

        //Console.WriteLine(s);

    }

    public static bool IsDaylightSavingsTime(ZonedDateTime zonedDateTime)

    {

    var instant = zonedDateTime.ToInstant();

    var zoneInterval = zonedDateTime.Zone.GetZoneInterval(instant);

    return zoneInterval.Savings != Offset.Zero;

   }

}