C# 獲取今天是星期幾

//獲取今天是星期幾
            string[] Day = new string[] { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
            string week = Day[Convert.ToInt32(DateTime.Now.DayOfWeek.ToString("d"))].ToString();
            this.LbWeekday.Content = week;