我有一面旗帜，例如[Flags]publicenumDaysOfTheWeek{Monday=1,Tuesday=2,Wednesday=4,Thursday=8,Friday=16,Saturday=32,Sunday=64}如果我想使用Linq基于包含特定标志的变量进行过滤，我可以尝试使用Enum.HasFlag在lambda语句中过滤多个标志，例如DaysOfWeekweekendFilter=DaysOfTheWeek.Saturday|DaysOfTheWeek.Sunday;varweekends=allDays.Where(d=>d.DayOfWeek.HasFlag(w