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How to: Write to the Application Event Log (Visual C#)
This example writes a string to the application event log on the local computer.
System.Diagnostics.EventLog appLog =
new System.Diagnostics.EventLog() ;
appLog.Source = "This Application's Name";
appLog.WriteEntry("An entry to the Application event log.");
Copy the code and paste it into the Main method of a console application.
A named source can be associated with only one event log (ArgumentException). The exception is thrown when the WriteEntry method is called.