对文件夹进行操作-操作文件夹

     protected   void  Page_Load( object  sender, EventArgs e)
    {
        DirectoryInfo d  =  Directory.CreateDirectory( " c:\\first " );
        DirectoryInfo d1  =  d.CreateSubdirectory( " first1 " );
        DirectoryInfo d2  =  d1.CreateSubdirectory( " first1_1 " );
        Directory.SetCurrentDirectory( " c:\\first " );
        Directory.CreateDirectory( " first2 " );
        Directory.CreateDirectory( " first2\\first2_1 " );
    }