using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var date = DateTime.Parse("2014-01-31 23:31:12.370");

        Console.WriteLine("New:"+UTCtoPST(date));

        Console.WriteLine("Old:"+UTCtoPSTOld(date));

        date = DateTime.Parse("2014-01-16 17:54:01.030");

        Console.WriteLine("New:"+UTCtoPST(date));

        Console.WriteLine("Old:"+UTCtoPSTOld(date));

    }

    public static String UTCtoPST(System.DateTime? utcDate)

    {

            DateTime utcDateTime = utcDate ?? DateTime.Now;

            TimeZoneInfo pstZone = TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time");

            DateTime pstTime = TimeZoneInfo.ConvertTimeFromUtc(utcDateTime, pstZone);

            string pstDate = pstTime.ToString();

            string pstpdt = pstZone.IsDaylightSavingTime(pstTime) ? " PDT" : " PST";

            return pstDate + pstpdt;

    }

    public static String UTCtoPSTOld(System.DateTime? utcDate)

        {

            DateTime utcDateTime = utcDate ?? DateTime.Now;

            TimeZoneInfo pstZone = TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time");

            DateTime now = DateTime.SpecifyKind(utcDateTime, DateTimeKind.Unspecified);

            DateTime pstTime = TimeZoneInfo.ConvertTimeToUtc(now, pstZone);

            string pstDate = pstTime.ToString();

            string pstpdt = pstZone.IsDaylightSavingTime

(pstTime) ? " PDT" : " PST";

            return pstDate + pstpdt;

        }

}