public void Then_WithEventSource_ThrowsArgumentException()
 {
     EventLogTraceListenerBuilder.UsingEventLogSource(null);
 }
 protected override void Act()
 {
     EventLogTraceListenerBuilder
     .Filter(SourceLevels.Warning);
 }
 protected override void Act()
 {
     EventLogTraceListenerBuilder.UsingEventLogSource(sourceName);
 }