摘要： 支持自定义每周的第一天是星期几 1 public static class DateTimeExtension 2 { 3 public const DayOfWeek TheFirstDayOfWeek = DayOfWeek.Monday; 4 5 private static int GetDayOfWeek(this DateTime date, DayOfWeek theFirstDayOfWeek = TheFirstDayOfWeek) 6 { 7 return ((int) date.Da... 阅读全文