/// <summary> /// Returns an instance of <see cref="DateTimeOffset"/> representing the start of the specified <strong>ISO 8601</strong> <paramref name="year"/> and <paramref name="week"/>. /// </summary> /// <param name="year">The <strong>ISO 8601</strong> year of the week.</param> /// <param name="week">The <strong>ISO 8601</strong> week number.</param> /// <param name="timeZone">The time zone to convert the <see cref="DateTimeOffset"/> value to.</param> /// <returns>An instance of <see cref="DateTimeOffset"/>.</returns> public static DateTimeOffset FromWeekNumber(int year, int week, TimeZoneInfo timeZone) { // Must have a time zone if (timeZone == null) { throw new ArgumentNullException(nameof(timeZone)); } // Get the start of the week DateTimeOffset time = FromWeekNumber(year, week, timeZone.BaseUtcOffset); // Adjust to the specified time zone time = TimeUtils.AdjustForTimeZoneAndDaylightSavings(time, timeZone); return(time); }