using System;

public class Program

{

    public static void Main()

    {

        var timeZones = TimeZoneInfo.GetSystemTimeZones();

​

        foreach (var zone in timeZones){

            Console.WriteLine($"{zone.Id} | {zone.DisplayName}");

        }

        DateTime timeUtc = DateTime.UtcNow;

        try

        {

           TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("America/Los_Angeles");

           DateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, cstZone);

           Console.WriteLine("The date and time are {0} {1}.",

                             cstTime,

                             cstZone.IsDaylightSavingTime(cstTime) ?

                                     cstZone.DaylightName : cstZone.StandardName);

        }

        catch (TimeZoneNotFoundException)

        {

           Console.WriteLine("The registry does not define the Central Standard Time zone.");

        }

        catch (InvalidTimeZoneException)

        {

           Console.WriteLine("Registry data on the Central Standard Time zone has been corrupted.");

        }

    }

}