Sends an acknowledgement for the remote that just accepted the invitation. The acknowledgement should be sent as soon as possible to avoid the remote from timing out the invitation. This method does not wait for the acknowledgement to be actually sent on the wire. The application should use the invite operation for this purpose.

Gets or sets the value to indicate whether the ack should be delayed. If delayed, the application is responsible for sending the acknowledgement later.

The dialog context that was accepted.

Gets the flag indicating if the original offer was null or not. If the original offer was null, the application cannot send Acknowledgement using this event argument.

Gets the response data for the event.