TimeCalculateTimeSchedule(DateTime, NullableDateTime, DateTime, NullableDateTime) Method

Converts a schedule time interval between a start date and an end date, if there are intervals greater than 24 hours, they are considered as times of a schedule that repeats for several days

public static TimeSpan CalculateTimeSchedule(
	DateTime dateStart,
	DateTime? timeStart,
	DateTime dateEnd,
	DateTime? timeEnd
)

Public Shared Function CalculateTimeSchedule ( 
	dateStart As DateTime,
	timeStart As DateTime?,
	dateEnd As DateTime,
	timeEnd As DateTime?
) As TimeSpan