c# 遍历文件夹

private void listFiles(DirectoryInfo dirInfo)
    {
        DirectoryInfo[] directorys = dirInfo.GetDirectories();
        FileInfo[] files = dirInfo.GetFiles();
        //FileInfo[] files = dirInfo.GetFiles("we*");


        foreach(DirectoryInfo dir in directorys)
        {
            string dirname =dir.Name;
            ListBox1.Items.Add("dir :" + dirInfo.Name + "/" + dirname);
            listFiles(dir);
        }

        foreach (FileInfo file in files)
        {
            string filename = file.Name;
            ListBox1.Items.Add("file :" + dirInfo.Name + "/" + filename);

            StreamReader sw = file.OpenText();
            sw.Close();
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        string path = Server.MapPath("image");
        DirectoryInfo dirInfo = new DirectoryInfo(path);

        listFiles(dirInfo);
    }
}