/// <summary>Implements the functionality to log the event.</summary>
/// <param name="entry">The entry to log.</param>
/// <returns>Returns null.</returns>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="entry"/> is a null (Nothing
/// in VB) reference.</exception>
protected override object LogInternal(LogEntry entry)
{
if (entry == null)
{
throw new ArgumentNullException("entry");
}
string formattedEvent = LoggingHelper.FormatEvent(entry);
this.writeToDebugWindow(formattedEvent);
// Returning an ID is inappropriate for this type of logger.
return(null);
}