public Course(string name, decimal price, DateTime startTime, DateTime endTime)
{
Name = name;
Price = price;
var isStartTimeBeforeEndTime = startTime <= endTime;
var isWeekDayCorrect = DateHelper.AllowedDaysOfWeek.Contains(startTime.DayOfWeek) &&
DateHelper.AllowedDaysOfWeek.Contains(endTime.DayOfWeek);
var isTimeCorrect = DateHelper.IsWorkTime(startTime) && DateHelper.IsWorkTime(endTime);
if (isStartTimeBeforeEndTime && isWeekDayCorrect && isTimeCorrect)
{
StartTime = startTime;
EndTime = endTime;
return;
}
throw ExceptionMessageHelper.GetExceptionAndPopulateMessage(isWeekDayCorrect, isTimeCorrect);
}