private void dir_list()

 {
  string path="D:\\Temp\\";                                  // Parent Directory
  string dirname = TextBox1.Text;                               // Reading directory name from a textbox in the form
  DirectoryInfo dir1=new DirectoryInfo(path+dirname);
  DirectoryInfo[] dirar=dir1.GetDirectories();
  FileInfo[] filear=dir1.GetFiles();  
  foreach(DirectoryInfo dir2 in dirar)
   {
    Response.Write(dir2.Name.ToString());
   }
   foreach(FileInfo fil2 in filear)
   {
    Response.Write(fil2.Name.ToString());
   }
 }