// Processes the messages that have been buffered.
// It is called by the ASP.NET when the flushing of 
// the buffer is required.
public override void ProcessEventFlush(
    WebEventBufferFlushInfo flushInfo)
{

    // Customize event information to be sent to 
    // the Windows Event Viewer Application Log.
    customInfo.AppendLine(
        "SampleEventLogWebEventProvider buffer flush.");

    customInfo.AppendLine(
        string.Format("NotificationType: {0}",
        GetNotificationType(flushInfo)));

    customInfo.AppendLine(
        string.Format("EventsInBuffer: {0}",
        GetEventsInBuffer(flushInfo)));

    customInfo.AppendLine(
        string.Format(
        "EventsDiscardedSinceLastNotification: {0}",
        GetEventsDiscardedSinceLastNotification(flushInfo)));

    // Read each buffered event and send it to the
    // Application Log.
    foreach (WebBaseEvent eventRaised in flushInfo.Events)
        customInfo.AppendLine(eventRaised.ToString());

    // Store the information in the specified file.
    StoreToFile(customInfo, logFilePath, FileMode.Append);
}