using System;

​

public class Program

{   

    public static void Main()

    {     

​

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

            var utcOffset = new DateTimeOffset(DateTime.UtcNow,TimeSpan.Zero);

            var localTime = utcOffset.ToOffset(tzInfo.BaseUtcOffset);

            if (tzInfo.IsDaylightSavingTime(localTime))

            {

               Console.WriteLine("-420");

            }

            else

            {

                 Console.WriteLine("-480");

            }

    }   

}