是老师布置Insus.NET的第三道题目。以下是Insus.NET的答案，仅供参考

代码如下: protected void Page_Load(object sender, EventArgs e) { //指定目标文件夹 string directory = ”C:\Windows\Microsoft.NET\Framework\v3.5″; IterationFile(directory); } private void IterationFile(string path) { DirectoryInfo di = new DirectoryInfo(path); //输