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Join related table and count rows or sum sql server 2005 count rows: SELECT * FROM Table1 LEFT JOIN     (SELECT Level1ID, COUNT(Level2ID) AS Total FROM Table2 GROUP BY Level1ID) AS... Remove file not in list ADD ... THEN ... UNTIL ... data: begin of SERIES, N1 type I value 10, N2 type I value 20, N3 type I value 30, N4 type I value 40, ...
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Use event log in windows 
System.Diagnostics.EventLog evtLog = new System.Diagnostics.EventLog();
evtLog.Source = "application";  // 應用程式
evtLog.WriteEntry("message", System.Diagnostics.EventLogEntryType.Warning);
evtLog.WriteEntry("message", System.Diagnostics.EventLogEntryType.Warning, 12029);