public override bool AbortRecord (LogRecord log)
   {

       // Check the validity of the record.
       if (log == null) return(true);
       Object[] record = log.Record as Object[];
       if (record == null) return(true);
       if (record.Length != 2) return(true);

       // Extract old account data from the record.
       string filename = (string) record[0];
       int balance = (int) record[1];

       // Restore the old state of the account.
       AccountManager.WriteAccountBalance(filename, balance);

       return(false);
   }