| Overload | Description |
|---|---|
| Addition(TdPeriodTime,TimeSpan) | Adds the specified TimeSpan to a TdPeriodTime. |
| Addition(TimeSpan,TdPeriodTime) | Adds the specified TimeSpan to a TdPeriodTime. |
| Addition(TdPeriodTime,TdIntervalDayToSecond) | Adds the specified TdIntervalDayToSecond to a TdPeriodTime. |
| Addition(TdIntervalDayToSecond,TdPeriodTime) | Adds the specified TdIntervalDayToSecond to a TdPeriodTime. |