窗體拖拽一個button，代碼樣例中使用FolderBrowserDialog對象new一個新實例，等同于在窗體拖拽FolderBrowserDialog控件，兩種方式都可以，實現(xiàn)功能效果是相同的

using System;
using System.Windows.Forms;

namespace WindowsFormsApp11
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();
            folderBrowserDialog.Description = "請選擇文件路徑";
            //// 設(shè)置根目錄在桌面
            //folderBrowserDialog.RootFolder = Environment.SpecialFolder.Desktop;
            // 設(shè)置當前選擇的路徑, folderBrowserDialog.RootFolder 兩種方式選擇其一即可
            folderBrowserDialog.SelectedPath = Application.StartupPath;
            // 允許在對話框中包括一個新建目錄的按鈕
            folderBrowserDialog.ShowNewFolderButton = true;
            if (folderBrowserDialog.ShowDialog() == DialogResult.OK)
            {
                // 獲取選擇目錄
                string path = folderBrowserDialog.SelectedPath;
                MessageBox.Show(path);
                // 業(yè)務(wù)操作...
                // 業(yè)務(wù)操作...
                // 業(yè)務(wù)操作...
            }
        }
    }
}