void Main()
{
    foreach (var tz in TimeZoneInfo.GetSystemTimeZones())
    {
        var cal = GetCal(tz);
        Console.WriteLine(tz.Id + " :: " + tz.SupportsDaylightSavingTime + " :: " + cal.TimeZones.First().ID);
    }
}

iCalendar GetCal(TimeZoneInfo timeZone)
{
    var calendar = new iCalendar();

    calendar.AddChild(iCalTimeZone.FromSystemTimeZone(timeZone));

    var @event = new Event
                     {
                         Name = "VEVENT",
                         DTStart = new iCalDateTime(DateTime.Now, timeZone.Id),
                         DTEnd = new iCalDateTime(DateTime.Now + TimeSpan.FromHours(1))
                     };

    calendar.Events.Add(@event);

    return calendar;
}