【原创】一个计算月份工作日的小方法

今天做的一个模块涉及到了一个判断工作日天数的小问题．思考了一番给出了解决方案．下面拿出来晒一下．

static void Main(string[] args)
        {
            int year = 2012;
            int month = 9;
            DateTime dateFrom = new DateTime(year, month, 1);
            DateTime dateTo = new DateTime(year, month, 30);
            TimeSpan ts = dateTo.AddDays(1) - dateFrom;

            int days = ts.Days - ts.Days / 7 * 2;
            Console.WriteLine("(1 before caculate) WorkDay count is : " + days);

            if (dateFrom.DayOfWeek == DayOfWeek.Sunday || ts.Days % 7 + (int)dateFrom.DayOfWeek == 7)
            {
                days -= 1;
            }
            else if (ts.Days % 7 + (int)dateFrom.DayOfWeek > 7)
            {
                days -= 2;
            }
            Console.WriteLine("(2 after caculate) WorkDay count is : " + days);
            Console.ReadKey();
        }