using System;

public class Program

{

    public static void Main()

    {

        var tz = TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time");

        var midnight = new DateTime(DateTime.Now.Date.Year, DateTime.Now.Date.Month, DateTime.Now.Date.Day, 0, 0, 0, DateTimeKind.Unspecified);

        midnight = TimeZoneInfo.ConvertTimeToUtc(midnight, tz);

        Console.WriteLine("Hello World:{0}", midnight);

        var utcMidnight = new DateTime(DateTime.UtcNow.Date.Year, DateTime.UtcNow.Date.Month, DateTime.UtcNow.Date.Day, 0, 0, 0, DateTimeKind.Unspecified);

        utcMidnight = TimeZoneInfo.ConvertTimeToUtc(utcMidnight, tz);

        Console.WriteLine("Hello World:{0}", utcMidnight);

    }

}