EventLog Constructor (String, String, String)

using System;
using System.Diagnostics;
using System.Threading;

class MySample{

    public static void Main(){
        // Create the source, if it does not already exist. 
        if (!EventLog.SourceExists("MySource"))
        {
            //An event log source should not be created and immediately used. 
            //There is a latency time to enable the source, it should be created 
            //prior to executing the application that uses the source. 
            //Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog");
            Console.WriteLine("CreatedEventSource");
            Console.WriteLine("Exiting, execute the application a second time to use the source.");
            // The source is created.  Exit the application to allow it to be registered. 
            return;
        }
        // Create an EventLog instance and assign its source.
        EventLog myLog = new EventLog("myNewLog", ".", "MySource");

        // Write an entry to the log.        
        myLog.WriteEntry("Writing to event log on " + myLog.MachineName);

    }
}