private bool IsValidRecurrencePattern(RecurrencePattern pattern)
{
if (!RecurrencePattern.IsValidPattern(pattern))
{
return(false);
}
if (this.Duration <= TimeSpan.Zero)
{
return(false);
}
if (this.RecurrenceRangeType == RecurrenceRangeType.RepeatUntil && this.RecursUntil < this.Start)
{
return(false);
}
if (!this.IsValidDuration(pattern))
{
return(false);
}
switch (this.RecurrenceType)
{
case RecurrenceType.Monthly:
return(this.DayOfMonth > 0 && this.DayOfMonth < 32);
case RecurrenceType.Yearly:
int daysInMoth = DateTime.DaysInMonth(this.Start.Year, this.MonthOfYear);
return(this.DayOfMonth <= daysInMoth && this.DayOfMonth > 0);
}
return(true);
}