These event arguments are passed by an EventLog.EntryWritten event.

public class EntryWrittenEventArgs : EventArgs {
// Public Constructors
   public EntryWrittenEventArgs( );
   public EntryWrittenEventArgs(EventLogEntry entry);
// Public Instance Properties
   public EventLogEntry Entry{get; }
}

Hierarchy

System.Object System.EventArgs EntryWrittenEventArgs

Passed To

EntryWrittenEventHandler.{BeginInvoke( ), Invoke( )}