using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Current Environment OS Version is: {0}", Environment.OSVersion);

        var timezones = TimeZoneInfo.GetSystemTimeZones();

        Console.WriteLine("There are {0} timezones in this system.", timezones.Count);

        foreach (var timezone in timezones)

        {

            Console.WriteLine("{0} ({1}|{2}|{3}): {4} (daylight saving: {5})->",

                timezone.Id, 

                timezone.DisplayName, timezone.StandardName, 

                timezone.DaylightName, timezone

                .BaseUtcOffset, timezone

                .SupportsDaylightSavingTime);

        }

    }

}