using System;
using System.IO;
namespace ConsoleApplication7
{
 /// <summary>
 /// Class1 的摘要说明。
 /// </summary>
 class Class1
 {
 /// <summary>
 /// 应用程序的主入口点。
 /// </summary>
 [STAThread]
 static void Main(string[] args)
 {
  string dirp=@"d:\\d";
  DirectoryInfo mydir = new DirectoryInfo(dirp);
  foreach (FileSystemInfo fsi in mydir.GetFileSystemInfos())
  {
  if (fsi is FileInfo)
  {
    FileInfo fi = (FileInfo)fsi;
    string x=System.IO.Path.GetDirectoryName(fi.FullName);
    Console.WriteLine(x);
    string s=System.IO.Path.GetExtension(fi.FullName);
    string y=System.IO.Path.GetFileNameWithoutExtension(fi.FullName);
    Console.WriteLine(y);
    if(s==".jpg")
    {
      System.IO.File.Copy(fi.FullName,x+@"\oo"+fi.Name); //在原文件名前加上OO
      System.IO.File.Delete(fi.FullName);
    }
  }
  }
  Console.WriteLine("成功");
  Console.ReadLine();
 }
 }
}