Raised when an incoming or outgoing connection authorization is needed from the application.

A connection pool was added.

A connection pool was removed.

Raised when a new incoming connection is added.

Raised when a new incoming connection is removed.

Raised when the TLS negotiation fails for an incoming connection. The failure may be due to an invalid local certificate, or remote not trusting the local certificate, or some other reason.

Raised when the listening is aborted either due to application calling StopListing or when an internal failure occurs such as failure to accept an incoming connection. The exception in the event argument can be null if the application called StopListening.

Raised when one or more items are added or removed from the list of listening addresses.