c#重新选择文件路径实现方法

FolderBrowserDialog fbdlg = new FolderBrowserDialog();
            fbdlg.Description = "请选择文件路径";

            if (fbdlg.ShowDialog() == DialogResult.OK)
            {
                string foldPath = fbdlg.SelectedPath;
                textBox1.Text = foldPath;
                return;

                DirectoryInfo theFolder = new DirectoryInfo(foldPath);
                FileInfo[] dirInfo = theFolder.GetFiles();
                //遍历文件夹
                foreach (FileInfo file in dirInfo)
                {
                    MessageBox.Show(file.ToString());
                }
            }