If the sequence has no elements, LastOrDefault will emit a default value before terminating successfully.

Tip

LastOrDefault is one of the simplest and most efficient ways of capturing the end of an observable sequence explicitly as a notification in the workflow. You can use it to react to the termination of a sequence regardless of whether that sequence produces values.

Examples

Use LastOrDefault to retrieve the last element of a sequence or a default value if the sequence is empty.

Related Operators

Use TakeLast to retrieve one or more elements from the end of the sequence.

This is a subtle but important difference between the LastOrDefault operator and TakeLast(1), which will also complete successfully when the source sequence is empty, but will not emit any values.