| Overload | Description |
|---|---|
| ThenPromiseUndefined(DNFunction<TResult>,DNFunction<Exception>) | Adds succeeded and failed handlers for this promise and returns a new promise, which is fulfilled when this promise is fulfilled. |
| ThenPromiseUndefined(NPromise<TResult>) | Adds succeeded and failed handlers for this promise and returns a new promise, which is fulfilled when this promise is fulfilled. |