C# 對話框之FolderBrowserDialog

//folder控件描述Environment.SpecialFolder.Desktop;
folderBrowserDialog1.Description = "請選擇一個包含TXT格式的文件夾：";
//指定folder根=桌面
folderBrowserDialog1.RootFolder = Environment.SpecialFolder.Desktop;
//是否添加新建文件夾的按鈕
folderBrowserDialog1.ShowNewFolderButton = true;

if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{


richTextBox1.Text = folderBrowserDialog1.SelectedPath;

}