C# Write to Event Log

The attached is code is used to write an event to the event log, i.e. Application Log. However, it doesn't include the user name that was executed the command. The user name just says N/A. I can include this:

...
sEvent = "Sample Event " + WindowsIdentity.GetCurrent().Name;
...

in the message, but is there a way to have it included in the event log itself?

using System;
using System.Diagnostics;
 
namespace WriteToAnEventLog_csharp
{
	/// Summary description for Class1.
	class Class1
	{
		static void Main(string[] args)
		{
			string sSource;
			string sLog;
			string sEvent;
 
			sSource = "dotNET Sample App";
			sLog = "Application";
			sEvent = "Sample Event";
 
			if (!EventLog.SourceExists(sSource))
				EventLog.CreateEventSource(sSource,sLog);
 
			EventLog.WriteEntry(sSource,sEvent);
			EventLog.WriteEntry(sSource, sEvent,
				EventLogEntryType.Warning, 234);
		}
	}
}

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