asp.net 如何获取本周日期 根据当天算出本周是几号到几号

DateTime currentDate = DateTime.Now.Date;
int dayOfWeek = (int)currentDate.DayOfWeek;
// 以星期日为第一天时，第一天为
DateTime firstDay = currentDate.AddDays(-dayOfWeek);
// 最后一天
DateTime lastDay = firstDay.AddDays(6);