/// <summary> /// Previous /// </summary> /// <param name="ldt"></param> /// <param name="dayOfWeek"></param> /// <returns></returns> public static LocalDateTime Previous(this LocalDateTime ldt, DayOfWeek dayOfWeek) { do { ldt = ldt.PreviousDay(); } while (ldt.DayOfWeek != dayOfWeek.AsIsoDayOfWeek()); return(ldt); }