检索时创建空白文件夹和zip文件

Question

我正在创建Windows窗体。我正在使用folderbrowserdialog，textbox和button。我正在从所有子目录中检索特定类型的文件，并将它们存储在新文件夹中，而不是压缩该文件。我想知道我的代码有什么问题，它创建文件夹，zipfile但新创建的文件夹和zip文件中没有文件。

private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDlg = new FolderBrowserDialog();
            folderBrowserDlg.ShowNewFolderButton = true;
            DialogResult dlgResult = folderBrowserDlg.ShowDialog();
            if (dlgResult.Equals(DialogResult.OK))
            {
                textBox1.Text = folderBrowserDlg.SelectedPath;
                Environment.SpecialFolder rootFolder = folderBrowserDlg.RootFolder;
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            string[] extensions = { ".xml",".ddg" };
            string[] d = Directory.GetFiles(textBox1.Text, "*.*", SearchOption.AllDirectories)
                .Where(f => extensions.Contains(new FileInfo(f).Extension.ToLower())).ToArray();
            //listBox1.Items.AddRange(d);
            var dir = @"D:\New folderl2221";  // folder location

              if (!Directory.Exists(dir))  // if it doesn't exist, create
                  Directory.CreateDirectory(dir);            
             foreach (var file in d)
              {
                  FileInfo mFile = new FileInfo(file);
                  // to remove name collusion
                  if (new FileInfo(dir + "\\" + mFile.Name).Exists == false)
                      mFile.MoveTo(dir + "\\" + mFile.Name);

              }     
         using (ZipFile zip = new ZipFile())
            {
               zip.AddFile(s, "files");               
                zip.AddDirectory(dir);
                zip.Save(@"D:\Ajax11.zip");
            }
        }