递归删除一个文件夹下的所有文件c＃代码

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 TemplateFileDelete
{
    public partial class DeleteFiles : Form
    {
        int i = 0;
        public DeleteFiles()
        {
            InitializeComponent();
        }

        private void BtOpen_Click(object sender, EventArgs e)
        {
            DealAction(sender, e);
        }

        private void BtOpen2_Click(object sender, EventArgs e)
        {
            DealAction(sender, e);
        }
        public void DealAction(object sender, EventArgs e)
        {
            fbdShow.ShowDialog();
            Button bt = (Button)(sender);
            if (bt.Name == "BtOpen")
            {
                this.TbPath1.Text = fbdShow.SelectedPath;
            }
            else if (bt.Name == "BtOpen2")
            {
                this.TbPath2.Text = fbdShow.SelectedPath;
            }

        }
        public void Dirs(string path)
        {
            DirectoryInfo dis = new DirectoryInfo(path);
            FileInfo[] files = dis.GetFiles();
            foreach (FileInfo fi in files)
            {
                i++;
                Application.DoEvents();
                this.label1.Text = i.ToString();
                try
                {
                    File.Delete(fi.FullName);
                }
                catch (Exception ex)
                {
                    this.richTextBox1.Text += ex.Message;
             
                }
          
              //  GetSqlFile(fi.FullName, this.textBox1.Text + fi.DirectoryName.Substring(2), fi.FullName.Substring(fi.FullName.LastIndexOf("\\") + 1), 1024, 768);
            }
            if (dis.GetDirectories().Length > 0)
            {
                for (int i = 0; i < dis.GetDirectories().Length; i++)
                {
                    Dirs(dis.GetDirectories()[i].FullName);
                }
            }

        }

        private void BtDelete_Click(object sender, EventArgs e)
        {
            Dirs(this.TbPath1.Text.Trim());
            Dirs(this.TbPath2.Text.Trim());
        }

    }
}