代码如下：

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 PractiseCCode

{

    public partial class FrmFolder : Form

    {

        public FrmFolder()

        {

            InitializeComponent();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            //复制所选目录下所有文件夹和文件

            string path = this.textBox1.Text.Trim();

            string newpath=this.textBox2.Text.Trim();

            copydirectory(path, newpath);

            MessageBox.Show("ok!");

        }

        private static void copydirectory(string oldpath, string newpath)

        {

            DirectoryInfo olddir = new DirectoryInfo(oldpath);

            DirectoryInfo newdir = new DirectoryInfo(newpath);

            if (!olddir.Exists)

            {

                MessageBox.Show("选择路径不能为空！");

            }

            if (!newdir.Exists)

            { //若目标路径没有文件夹，就新建一个

                Directory.CreateDirectory(newpath);

            }

            FileInfo[] files = olddir.GetFiles(); //找出目录下所有文件

            foreach (FileInfo fi in files)

            {

                File.Copy(fi.FullName, newpath + "\\" + fi.Name,true);

            }

            DirectoryInfo[] dirs = olddir.GetDirectories(); //找出目录下的所有文件夹

            foreach ( DirectoryInfo di in dirs)

            {

                copydirectory(di.FullName, newpath +"\\"+ di.Name);

            }

        

        }

        private void button1_Click(object sender, EventArgs e)

        {

            FolderBrowserDialog fbdlog = new FolderBrowserDialog();

            DialogResult dr = fbdlog.ShowDialog();

            if (dr == DialogResult.OK)

            {

                textBox1.Text = fbdlog.SelectedPath;

            }

        }

        

    }

}