public DateTime GetPrevious(DateTime fromDate)
{
DateTime date = fromDate;
while (!this.MonthMatches(date))
{
date = date.AddMonths(1);
}
date = date.AddYears(-1);
return(RelativeDate.GetDate(date.Year, date.Month, this.WeeksInMonth, this.DaysOfWeekExt));
}
public DateTime GetPrevious(DateTime fromDate)
{
if (this.MonthCount <= 0)
{
throw new InvalidOperationException($"Invalid Month Count property value ({this.MonthCount})");
}
DateTime date = fromDate;
while (!this.DateMatches(date))
{
date = date.AddDays(1);
}
date = date.AddMonths(-this.MonthCount);
return(RelativeDate.GetDate(date.Year, date.Month, this.WeeksInMonth, this.DaysOfWeekExt));
}
protected bool DateMatches(DateTime date)
{
DateTime matchDate = RelativeDate.GetDate(date.Year, date.Month, this.WeeksInMonth, this.DaysOfWeekExt);
return(matchDate == date.Date);
}