/// <summary>
 /// イベントログを終了します。
 /// </summary>
 public override void Close() => _listener.Close();
 public void CloseSucceeds()
 {
     using (var listener = new EventLogTraceListener("test trace listener"))
         listener.Close(); // shouldn't fail.
 }
 public override void Close()
 {
     _listener.Close();
     base.Close();
 }