/// <summary>
/// Gets the number of hours within a given day of the time zone,
/// taking transitions into account.
/// </summary>
/// <remarks>
/// The time part (hours, minutes, seconds, etc.) of
/// <paramref name="date"/>, as well as whether its local or UTC,
/// is ignored.
/// </remarks>
public static double HoursInDay(this TimeZoneInfo tz, DateTime date)
{
return(tz.GetDayLength(date).TotalHours);
}
public void GetDayLength(double hours, int year, int month, int day, int hour, int minute)
{
Assert.Equal(TimeSpan.FromHours(hours), CustomTimeZone.GetDayLength(new DateTime(year, month, day, hour, minute, 0)));
}