protected virtual void OnDirectoryRemoved(DirectoryScanningMonitorEventArgs e)
        {
            EventHandler <DirectoryScanningMonitorEventArgs> handler = DirectoryRemoved;

            if (null != handler)
            {
                handler(this, e);
            }
        }
 protected virtual void OnDirectoryRemoved(DirectoryScanningMonitorEventArgs e) {
     EventHandler<DirectoryScanningMonitorEventArgs> handler = DirectoryRemoved;
     if(null != handler) {
         handler(this, e);
     }
 }