文件批量更名

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace ChangeFileName
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        private void button1_Click（object sender EventArgs e）
        {
            try
            {
                openFileDialog1.ShowDialog（）;
                textBox1.Text = openFileDialog1.FileName;
                textBox2.Text = textBox1.Text.Substring（textBox1.Text.LastIndexOf（“\\“） + 1 （textBox1.Text.LastIndexOf（“.“） - textBox1.Text.LastIndexOf（“\\“） - 1））;
                textBox3.Text = textBox1.Text.Substring（textBox1.Text.LastIndexOf（“.“） + 1 （textBox1.Text.Length - textBox1.Text.LastIndexOf（“.“） - 1））;
            }
            catch { }
        }

        private void button2_Click（object s

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件         932  2009-02-10 10:32  sj\01\ChangeFileName\ChangeFileName.sln
     文件       13312  2009-02-10 10:39  sj\01\ChangeFileName\ChangeFileName.suo
     文件        3774  2009-02-10 10:34  sj\01\ChangeFileName\ChangeFileName\ChangeFileName.csproj
     文件        1330  2009-02-10 10:35  sj\01\ChangeFileName\ChangeFileName\Form1.cs
     文件        5989  2009-02-10 10:34  sj\01\ChangeFileName\ChangeFileName\Form1.Designer.cs
     文件        6017  2009-02-10 10:34  sj\01\ChangeFileName\ChangeFileName\Form1.resx
     文件         495  2009-02-10 10:32  sj\01\ChangeFileName\ChangeFileName\Program.cs
     文件       10240  2009-02-10 10:35  sj\01\ChangeFileName\ChangeFileName\bin\Debug\ChangeFileName.exe
     文件       24064  2009-02-10 10:35  sj\01\ChangeFileName\ChangeFileName\bin\Debug\ChangeFileName.pdb
     文件       14328  2009-02-10 10:38  sj\01\ChangeFileName\ChangeFileName\bin\Debug\ChangeFileName.vshost.exe
     文件         490  2007-07-21 01:33  sj\01\ChangeFileName\ChangeFileName\bin\Debug\ChangeFileName.vshost.exe.manifest
     文件         709  2009-02-10 10:38  sj\01\ChangeFileName\ChangeFileName\obj\Debug\ChangeFileName.csproj.FileListAbsolute.txt
     文件         847  2009-02-10 10:34  sj\01\ChangeFileName\ChangeFileName\obj\Debug\ChangeFileName.csproj.GenerateResource.Cache
     文件       10240  2009-02-10 10:35  sj\01\ChangeFileName\ChangeFileName\obj\Debug\ChangeFileName.exe
     文件         180  2009-02-10 10:34  sj\01\ChangeFileName\ChangeFileName\obj\Debug\ChangeFileName.Form1.resources
     文件       24064  2009-02-10 10:35  sj\01\ChangeFileName\ChangeFileName\obj\Debug\ChangeFileName.pdb
     文件         180  2009-02-10 10:34  sj\01\ChangeFileName\ChangeFileName\obj\Debug\ChangeFileName.Properties.Resources.resources
     文件        1360  2009-02-10 10:32  sj\01\ChangeFileName\ChangeFileName\Properties\AssemblyInfo.cs
     文件        2878  2009-02-10 10:32  sj\01\ChangeFileName\ChangeFileName\Properties\Resources.Designer.cs
     文件        5612  2009-02-10 10:32  sj\01\ChangeFileName\ChangeFileName\Properties\Resources.resx
     文件        1099  2009-02-10 10:32  sj\01\ChangeFileName\ChangeFileName\Properties\Settings.Designer.cs
     文件         249  2009-02-10 10:32  sj\01\ChangeFileName\ChangeFileName\Properties\Settings.settings
     文件         953  2009-02-10 10:39  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile.sln
     文件       14848  2009-02-10 10:46  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile.suo
     文件        3788  2009-02-10 10:41  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile\CopyFileAndDeleteFile.csproj
     文件        1708  2009-02-10 10:45  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile\Form1.cs
     文件        8335  2009-02-10 10:43  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile\Form1.Designer.cs
     文件        6430  2009-02-10 10:43  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile\Form1.resx
     文件         502  2009-02-10 10:39  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile\Program.cs
     文件       11264  2009-02-10 10:45  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile\bin\Debug\CopyFileAndDeleteFile.exe
     文件       26112  2009-02-10 10:45  sj\02\CopyFileAndDeleteFile\CopyFileAndDeleteFile\bin\Debug\CopyFileAndDeleteFile.pdb
............此处省略49个文件信息