Windows C#

using System;
using System.Diagnostics;
class MainClass {
    public static void Main() {
        if (!EventLog.SourceExists("C#")) {
            EventLog.CreateEventSource("C#", "Application");
        }
        EventLog.WriteEntry(
            "C#",                          // Registered event source
            "A simple test event.",        // Event entry message
            EventLogEntryType.Information, // Event type
            1,                             // Application-specific ID
            0,                             // Application-specific category
            new byte[] { 10, 55, 200 }       // Event data
        );
    }
}