When an exception is raised during the insert operation, use the DetailsViewInsertedEventArgs.ExceptionHandled property to indicate whether the exception was handled in the event handler. When this property is set to true, the exception is considered handled and is not passed further up the call stack. If this property is set to false, the exception is passed to the next method on the call stack for handling. To determine which exception was raised, use the DetailsViewInsertedEventArgs.Exception property.