批量修改文件名

 String[] files=System.IO.Directory.GetFiles(@"D:\Projects\OILGAS\OILGAS.Services\Portal\Subject");
        foreach(String f in files){
        System.IO.FileInfo fi = new System.IO.FileInfo(f);
            Console.WriteLine(fi.FullName.Replace("Exhibition","Subject"));
      fi.MoveTo(fi.FullName.Replace("Exhibition","Subject"));