public void GetWMDay()

        {

            List<string> list = new List<string>();

            string year = "";

            DateTime counYear = Convert.ToDateTime(year + "-01-01"); //

            DateTime nestYear = counYear.AddYears();

            for (DateTime i = counYear; i < nestYear; i = i.AddDays())

            {

                if ((int)i.DayOfWeek == )

                {  // 周日    to do   }

                    list.Add("周日" + i.ToShortDateString());

                }

                else if ((int)i.DayOfWeek == )

                {   //周六  to do  }

                    list.Add("周六" + i.ToShortDateString());

                }

            }

            MessageBox.Show("完成");

        }

  /// <summary>

        /// 获得指定年,月 的周六和周日的   年月日

        /// </summary>

        /// <param name="year"></param>

        /// <returns></returns>

        public List<DateTime> GetWMDay(int year,int month)

        {

            List<DateTime> list = new List<DateTime>();

            DateTime counYear = Convert.ToDateTime(string.Format("{0}-{1}-01",year,month));

            DateTime nestYear = counYear.AddMonths();

            for (DateTime i = counYear; i < nestYear; i = i.AddDays())

            {

                if ((int)i.DayOfWeek == )

                {  // 周日    to do   }

                    list.Add(i);

                }

                else if ((int)i.DayOfWeek == )

                {   //周六  to do  }

                    list.Add(i);

                }

            }

            return list;

        }