监视文件夹内，文件变化。

试试监视指定文件夹内文件的变化

   public WatcherTimer(FileSystemEventHandler watchHandler)
        {
            m_timer = new System.Threading.Timer(new TimerCallback(OnTimer), null, Timeout.Infinite, Timeout.Infinite);
            fswHandler = watchHandler;

        }


        public WatcherTimer(FileSystemEventHandler watchHandler, int timerInterval)
        {
            m_timer = new System.Threading.Timer(new TimerCallback(OnTimer), null, Timeout.Infinite, Timeout.Infinite);
            TimeoutMillis = timerInterval;
            fswHandler = watchHandler;

        }

        public void OnFileChanged(object sender, FileSystemEventArgs e)
        {
            //MessageBox.Show("Created", "Create triggered");
            Mutex mutex = new Mutex(false, "FSW");
            mutex.WaitOne();
            if (!files.Contains(e.Name))
            {
                files.Add(e.Name);
            }
            mutex.ReleaseMutex();

            m_timer.Change(TimeoutMillis, Timeout.Infinite);
        }

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
using System.Collections;

namespace FileMonitor
{

    public partial class Form1 : Form
    {
        private int TimeoutMillis = 100;
        System.IO.FileSystemWatcher fsw = new System.IO.FileSystemWatcher（）;
        WatcherTimer watcher = null;
        public Form1（）
        {
            InitializeComponent（）;
            watcher = new WatcherTimer（fsw_Changed TimeoutMillis）;
        }

        private void fileWatcher_Created（object sender System.IO.FileSystemEventArgs e）
        {
            string file = e.FullPath;
           

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-02-04 09:22  FileMonitor\
     目录           0  2017-01-25 15:44  FileMonitor\Backup\
     文件        3811  2008-07-04 13:13  FileMonitor\Backup\FileMonitor.csproj
     文件         911  2008-07-04 02:29  FileMonitor\Backup\FileMonitor.sln
     文件       58368  2017-01-25 15:42  FileMonitor\Backup\FileMonitor.v11.suo
     文件        8296  2008-07-04 00:59  FileMonitor\Backup\Form1.Designer.cs
     文件        3847  2008-07-05 12:04  FileMonitor\Backup\Form1.cs
     文件        5814  2008-07-04 00:59  FileMonitor\Backup\Form1.resx
     文件         503  2008-04-04 15:09  FileMonitor\Backup\Program.cs
     目录           0  2017-01-25 15:44  FileMonitor\Backup\Properties\
     文件        1434  2008-04-04 15:09  FileMonitor\Backup\Properties\AssemblyInfo.cs
     文件        2851  2008-04-04 15:09  FileMonitor\Backup\Properties\Resources.Designer.cs
     文件        5612  2008-04-04 15:09  FileMonitor\Backup\Properties\Resources.resx
     文件        1096  2008-04-04 15:09  FileMonitor\Backup\Properties\Settings.Designer.cs
     文件         249  2008-04-04 15:09  FileMonitor\Backup\Properties\Settings.settings
     文件        2008  2008-07-05 12:05  FileMonitor\Backup\WatcherTimer.cs
     文件        4000  2017-01-25 15:44  FileMonitor\FileMonitor.csproj
     文件        1410  2017-02-04 09:46  FileMonitor\FileMonitor.sln
     文件       58368  2017-01-25 15:42  FileMonitor\FileMonitor.suo
     文件      143872  2017-02-04 13:08  FileMonitor\FileMonitor.v11.suo
     文件        8883  2017-02-04 09:46  FileMonitor\Form1.Designer.cs
     文件        3846  2017-02-04 09:46  FileMonitor\Form1.cs
     文件        5814  2017-02-04 09:46  FileMonitor\Form1.resx
     文件         503  2008-04-04 15:09  FileMonitor\Program.cs
     目录           0  2017-01-25 15:41  FileMonitor\Properties\
     文件        1434  2008-04-04 15:09  FileMonitor\Properties\AssemblyInfo.cs
     文件        2862  2017-01-25 15:44  FileMonitor\Properties\Resources.Designer.cs
     文件        5612  2008-04-04 15:09  FileMonitor\Properties\Resources.resx
     文件        1111  2017-01-25 15:44  FileMonitor\Properties\Settings.Designer.cs
     文件         249  2008-04-04 15:09  FileMonitor\Properties\Settings.settings
     目录           0  2017-02-04 10:52  FileMonitor\TestFileMonitor\
............此处省略64个文件信息