C#獲取當前時間的上週一和上週日

 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)).ToString("yyyy-MM-dd");
			 var Sun = date.AddDays((-7 - s)).ToString("yyyy-MM-dd");
			Console.WriteLine(m);
			Console.WriteLine(s);
			Console.WriteLine(Mon);
			Console.WriteLine(Sun);