C＃：FileSystemWatcher仅派发ChangedEvent

我正在使用C＃中的FileSystemWatcher构造。作为课程的标准，我让我的观察者仅仅关注感兴趣的目录。我遇到的问题是，无论用户事件（复制，创建，重命名），我正在拾取的唯一事件是Changed事件。C＃：FileSystemWatcher仅派发ChangedEvent

例如。

观看文件 “C：\桌面\ MattsRequest”
创建文件 “C：\桌面\ MattsRequest \ Dummy.txt”
观察，只有给onChanged处理与“改变”一个FileSystemEventArg和路径ARG引发的是“C：\桌面\ MattsRequest” 并没有提到什么文件被创建

我的监视器代码看起来像这样。

  watcher = new FileSystemWatcher(); 
      //watcher.IncludeSubdirectories = true; 
      watcher.InternalBufferSize = 32768 * 2; 
      //Can't use a synchro because I can't find an example of something that 
      //implements ISynchroniz-whatever 
      //watcher.SynchronizingObject = 

      watcher.Path = filePath; 

      watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite 
            | NotifyFilters.FileName | NotifyFilters.DirectoryName 
            | NotifyFilters.CreationTime; 

      watcher.Changed += OnChanged; //Gets triggered 
      watcher.Created += OnCreated; //Never triggered 
      watcher.Deleted += OnDeleted; 
      watcher.Renamed += OnRenamed; //Never triggered 
      watcher.Error += WatcherOnError; //Never triggered 

      // Begin watching. 
      watcher.EnableRaisingEvents = true;

下面是当我创建的监控目录的新文件的图像，并且它触发关闭事件。它的类型当然是Changed，但它并不告诉我创建了哪个文件。