c#的FileSystemWatcher对象监视文件的变化的事件，无休止的触发事件的解决办法

FileSystemWatcher.Changed 事件

中又修改文件时 会发生死循环

原因是：程序收到文件发生更改的通知后，马上又修改了文件，从而又使文件产生了更改的通知

static void watcher_Changed(object sender, FileSystemEventArgs e)
{
lock (obj)
{
File.AppendAllText(@"D:\test\t.txt", "test");
}

FileSystemWatcher watcher = (FileSystemWatcher)sender;
watcher.EnableRaisingEvents = false;
System.Threading.Thread.Sleep(100);
watcher.EnableRaisingEvents = true;
}

这行代码似乎解决了问题：FileSystemWatcher watcher = (FileSystemWatcher)sender;
watcher.EnableRaisingEvents = false;
System.Threading.Thread.Sleep(100);
watcher.EnableRaisingEvents = true;

但有待验证