我的FileSystemWatcher不起作用c＃

Question

我有FileSystemWatcher类的问题。我有这段代码：

RunningPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\Reporter\\";
XMLConfigWatcher = new FileSystemWatcher(RunningPath);
XMLConfigWatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName | NotifyFilters.Size;
XMLConfigWatcher.Filter = "database.xml";
XMLConfigWatcher.Changed += new FileSystemEventHandler(XMLConfigChanged);
XMLConfigWatcher.EnableRaisingEvents = true;

我想观察一个文件 - database.xml文件。它是小文件。我赢得了XP并且它没有在我的计算机上运行，​​但是我的朋友有Win 7并且它激发了财产。是什么原因以及如何纠正它？

当然，我附上Changed Event：

public void XMLConfigChanged(object sender, FileSystemEventArgs e)
{ 
    MessageBox.Show("Config changed from outside.");
    foreach (ProgramToGrid f in collection)
    {
        f.watcher.finalize();
    }

    App.Current.Dispatcher.Invoke((Action)delegate
    {
        collection.Clear();
    });

    XmlAccess xml = XmlAccess.getInstance();

    foreach (Program f in xml.getApps())
    {
        ProgramToGrid ptg = new ProgramToGrid(f.getFolder(), f.getMail(), f.getSubject());
        ptg.watcher = new BugWatcher(f.getFolder(), f.getMail(), f.getSubject());

        App.Current.Dispatcher.Invoke((Action)delegate
        {
            collection.Add(ptg);
        });
    }
}