Completes the specified asynchronous lookup operation.
IAsyncResult that identifies the asynchronous lookup operation to finish, and from which to retrieve an end result.The who is response from the server.
When the LookupCompleted event is raised, EndLookup completes the operation that was initiated by the BeginLookup call.
| Exception Type | Condition |
|---|---|
| WhoIsException | Thrown when the message cannot be sent. |