foreach (string p in paths)
            {
                FileSystemWatcher watcher = new FileSystemWatcher();
                watcher.Path = p;
                watcher.IncludeSubdirectories = true;
                watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;

                //watcher.Filter = "*.txt";

                watcher.Changed += new FileSystemEventHandler(OnChanged);
                watcher.Created += new FileSystemEventHandler(OnChanged);
                //watcher.Deleted += new FileSystemEventHandler(OnChanged);
                watcher.Renamed += new RenamedEventHandler(OnRenamed);

                watcher.EnableRaisingEvents = true;
            }

watcher.EnableRaisingEvents = false