public static DateTime GetDate(int year, EMonth month, EWeeksInMonth weekInMonth, EDaysOfWeekExt dayOfWeekExt)
{
int monthNumber = Month.GetMonthNumber(month);
bool lookForward = true;
DateTime date;
switch (weekInMonth)
{
case EWeeksInMonth.First:
date = new DateTime(year, monthNumber, 1);
break;
case EWeeksInMonth.Second:
date = new DateTime(year, monthNumber, 8);
break;
case EWeeksInMonth.Third:
date = new DateTime(year, monthNumber, 15);
break;
case EWeeksInMonth.Fourth:
date = new DateTime(year, monthNumber, 22);
break;
case EWeeksInMonth.Last:
date = new DateTime(year, monthNumber, DateTime.DaysInMonth(year, monthNumber));
lookForward = false;
break;
default:
throw new ArgumentException($"Unrecognized Week in Month ({weekInMonth})!");
}
if (lookForward)
{
while (!date.DateMatches(dayOfWeekExt))
{
date = date.AddDays(1);
}
}
else
{
while (!date.DateMatches(dayOfWeekExt))
{
date = date.AddDays(-1);
}
}
return(date);
}