/// <summary>
        /// 應用程序的主入口點。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }

private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog dilog = new FolderBrowserDialog();
            dilog.Description = "請選擇文件夾";
            if(dilog.ShowDialog() == DialogResult.OK || dilog.ShowDialog() == DialogResult.Yes)
            {
                path=dilog.SelectedPath;
            }
        }

private void button2_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(path))
            {
                System.Diagnostics.Process.Start("Explorer.exe", path);
            }
            else
            {
                MessageBox.Show("請選擇路徑");
            }
        }

private void button1_Click(object sender, EventArgs e)
        {
            Thread newThread = new Thread(new ThreadStart(TEST));
            newThread.SetApartmentState(ApartmentState.STA);
            newThread.Start();
            //或
            //Thread app = new Thread(new ParameterizedThreadStart(TEST));//兩個TEST方法不一樣，委托類型不一樣
            //app.ApartmentState = ApartmentState.STA;
            //app.Start();

        }

        private void TEST(object obj)
        {
            FolderBrowserDialog dilog = new FolderBrowserDialog();
            dilog.Description = "請選擇文件夾";
            if(dilog.ShowDialog() == DialogResult.OK)
            {
                path=dilog.SelectedPath;
            }

        }
        private void TEST()
        {
            FolderBrowserDialog dilog = new FolderBrowserDialog();
            dilog.Description = "請選擇文件夾";
            if (dilog.ShowDialog() == DialogResult.OK)
            {
                path = dilog.SelectedPath;
            }
        }