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Demonstrates registering and event source and writing to the Application Log

/* C# Programming Tips & Techniques by Charles Wright, Kris Jamsa Publisher: Osborne/McGraw-Hill (December 28, 2001) ISBN: 0072193794 */ // AppLog.cs -- Demonstrates registering and event source and writing to the //              Application Log. // //              Compile this program with the following command line: //                  C:>csc AppLog using System; using System.Diagnostics; using System.IO; namespace nsEventLogs {     public class AppLog     {         static public void Main ()         {             // Create the EventLog object             EventLog EvLog = new EventLog ();                          // Register the source if it has not already been registered             if (!EventLog.SourceExists ("AppLog.exe"))             {                 Console.WriteLine ("Creating event log source");                 EventLog.CreateEventSource ("AppLog.exe", "Application");             }                          // Set the source for the messages to be display in the Event Viewer             EvLog.Source = "AppLog.exe";             // Throw an exception. You don't have to do this, but it's a good reason to             // write to the log.             try             {                 CauseTrouble ();             }             catch (IOException)             {                 // Write the information to the application log                 EvLog.WriteEntry("IO exception was thrown", EventLogEntryType.Warning);             }         }         static void CauseTrouble ()         {             throw (new IOException());         }     } }