public void ChangeDayInSchedule(int id, int newdayid)
{
ScheduleDaysList.Find(item => item.ScheduleDayId == id).days = Days.GetDayById(newdayid);
}
public ScheduleDays CreateScheduleDay(int id, int scheduleid, int dayid)
{
ScheduleDays scheduleday = new ScheduleDays(id, Schedule.GetScheduleById(scheduleid), Days.GetDayById(dayid));
ScheduleDaysList.Add(scheduleday);
return(scheduleday);
}