C# 獲取上周周一和周日的日期

C#  獲取上周周一和周日的日期

 var date = DateTime.Now;
 var m = (date.DayOfWeek == DayOfWeek.Sunday ? (DayOfWeek)7 : date.DayOfWeek) - DayOfWeek.Monday;
 var s = (date.DayOfWeek == DayOfWeek.Sunday ? (DayOfWeek)7 : date.DayOfWeek) - (DayOfWeek)7;
 var Mon = date.AddDays((-7 - m));
 var Sun = date.AddDays((-7 - s));