[MapiCalendarYearlyAndMonthlyRecurrencePattern.Position property 获取或设置每个月的重复发生天数。 public DayPosition Position { get; set; } 也可以看看 enum DayPosition class MapiCalendarYearlyAndMonthlyRecurrencePattern 命名空间 Aspose.Email.Mapi 部件 Aspose.Email]