The System.Data.SqlClient.SqlNotificationType enumeration is referenced by an instance of the System.Data.SqlClient.SqlNotificationEventArgs class. This information is provided when a notification event is fired with the System.Data.SqlClient.SqlDependency class.
Data on the server being monitored changed. Use the System.Data.SqlClient.SqlNotificationInfo item to determine the details of the change.
There was a failure to create a notification subscription. Use the System.Data.SqlClient.SqlNotificationEventArgs object's System.Data.SqlClient.SqlNotificationInfo item to determine the cause of the failure.
Used when the type option sent by the server was not recognized by the client.