static void Main(string[] args) {
        // Open a connection to the Oracle server.       
        OracleConnection con = new OracleConnection("Server = ora; User Id = sys; Password = pwd; Mode = SysDba");
        con.Open();

        // Create the OracleAlerter instance and register it for the "my_alert" Oracle Alert.      
        OracleAlerter alerter = new OracleAlerter();
        alerter.Connection = con;
        alerter.AlertName = "my_alert";
        alerter.Timeout = 5;
        alerter.Interval = 0;

        // Set the event handler for receiving an alert.
        alerter.Alert += new OracleAlerterAlertEventHandler(Alerter_OnAlert);

        // Start the alerter. It will wait for alerts and fire the OnAlert event when any is received.
        alerter.Start();

        // Pause the thread to wait until the alerter begins listening. 
        Thread.Sleep(2000);

        // Another instance of OracleAlerter is used to generate the alert.
        // alertGenerator uses the same connection and alert name as the alerter object.
        OracleAlerter alertGenerator = new OracleAlerter();
        alertGenerator.Connection = con;
        alertGenerator.AlertName = "my_alert";

        // Send an alert to the server. At this moment alerter should raise the Alert event.
        alertGenerator.Signal("An alert message.");

        // Make a pause to wait until the alert is created and processed.
        Thread.Sleep(2000);

        // Stop listening to alerts.
        alerter.Stop();

        Console.Read();      
        con.Close();
}

    // Simple event handler for the OnAlert event.
public static void Alerter_OnAlert(object sender, OracleAlerterAlertEventArgs e) {
        Console.WriteLine("Got an alert: " + e.AlertMessage);
}