public void readGroupSchedule(DateTime?start, DateTime?end)
{
ScheduleDAL scheduleDAL = new ScheduleDAL();
scheduleDAL.userId = this.userId;
scheduleDAL.scheduleId = this.scheduleId;
scheduleDAL.freeSlot = this.freeSlot;
scheduleDAL.freeSlotTimeFrom = this.freeSlotTimeFrom;
scheduleDAL.freeSlotTimeTo = this.freeSlotTimeTo;
scheduleList = scheduleDAL.readSchedule(this.groupId, start, end);
}