public TimeBucket <TCalendar> AddDatePart(int value)
{
Given = StartPoint = DatePart switch
{
DatePart.Minute => StartPoint.AddMinutes(value),
DatePart.Hour => StartPoint.AddHours(value),
DatePart.Day => StartPoint.AddDays(value),
DatePart.Week => StartPoint.AddDays(7 * value),
DatePart.Month => _calendar.AddMonths(StartPoint, value),
DatePart.Year => _calendar.AddYears(StartPoint, 1),
_ => throw new ArgumentOutOfRangeException(nameof(Contract.DatePart), DatePart, null)
};
EndPoint = DatePart switch
{
DatePart.Minute => EndPoint.AddMinutes(value),
DatePart.Hour => EndPoint.AddHours(value),
DatePart.Day => EndPoint.AddDays(value),
DatePart.Week => EndPoint.AddDays(7 * value),
DatePart.Month => _calendar.AddMonths(EndPoint, value),
DatePart.Year => _calendar.AddYears(EndPoint, 1),
_ => throw new ArgumentOutOfRangeException(nameof(Contract.DatePart), DatePart, null)
};
PartialStart = PartialEnd = false;
return(this);
}