private void button1_Click(object sender, EventArgs e)
    {
        int changedCount = 0;
        int addedCount = 0;
        List<FileUnit> deleted = new List<FileUnit>();
        List<string> files = ESBasic.Helpers.FileHelper.GetOffspringFiles(AppDomain.CurrentDomain.BaseDirectory + "
 
FileFolder\\");
        //第一輪：檢測發生變化和新增的檔案
        foreach (string fileRelativePath in files)
        {
            FileInfo info = new FileInfo(AppDomain.CurrentDomain.BaseDirectory + "FileFolder\\" + fileRelativePath);
            FileUnit unit = this.GetFileUnit(fileRelativePath);
            
 
if (unit == null) //新增的檔案
            {
                unit = new FileUnit(fileRelativePath, 1, (int)info.Length, info.LastWriteTime);
                this.fileConfig.FileList.Add(unit);
                ++addedCount;
            }
            else
            {
                //發生變化的檔案
                if
 
 (unit.FileSize != info.Length || unit.LastUpdateTime.ToString() != info.LastWriteTime.ToString())
                {
                    unit.Version += 1;
                    unit.FileSize = (int)info.Length;
                    unit.LastUpdateTime = info.LastWriteTime;
                    ++changedCount;
                }
            }
        }

        //第二輪：檢測被刪除的檔案
        foreach (FileUnit unit in this.fileConfig.FileList)
        {
            bool found = false;
            foreach (string fileRelativePath in files)
            {
                if (fileRelativePath == unit.FileRelativePath)
                {
                    found = true;
                    break;
                }
            }
            if (!found)
            {
                deleted.Add(unit);
            }
        }

        foreach (FileUnit unit in deleted)
        {
            this.fileConfig.FileList.Remove(unit);
        }
        this.fileConfig.Save();

        if (changedCount > 0 || addedCount > 0 || deleted.Count > 0)
        {
            this.changed = true;
            this.dataGridView1.DataSource = null;
            this.dataGridView1.DataSource = this.fileConfig.FileList;
            string msg = string.Format("更新：{0}，新增：{1}，刪除：{2}", changedCount, addedCount, deleted.Count);
            MessageBox.Show(msg);
        }
        else
        {
            MessageBox.Show("沒有檢測到變化。");
        }           
    }