VB.NET读取FTP服务器中的所有文件夹

我有一个代码，用于显示FTP服务器中某个文件夹内的所有文件，
但我不知道如何查看FTP服务器或
内的文件夹 在另一个文件夹中.

这是显示文件夹内文件的代码

I have a code for displaying all files inside a folder in a FTP Server,
but I dont know how to view a folder inside of a FTP Server or
inside an another folder.

Here''s the code to display a file inside a folder

reqFTP = DirectCast(WebRequest.Create("ftp://ftp.microsoft.com/"), FtpWebRequest)
        reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails
        reqFTP.Credentials = New NetworkCredential(UserID, Password)
        response = DirectCast(reqFTP.GetResponse(), FtpWebResponse)
        Dim responseStream As Stream = response.GetResponseStream()
        Dim reader As New StreamReader(responseStream)
        Dim CrLf As Char() = {Constants.vbCr, Constants.vbLf}
        Dim lines() As String = reader.ReadToEnd().Split(CrLf, StringSplitOptions.RemoveEmptyEntries)
        Dim lineArr() As String
        For i As Integer = 0 To UBound(lines)
            lineArr = Split(lines(i))
            lstFTPfiles.Items.Add(lineArr(UBound(lineArr)))
        Next
        responseStream.Close()
        response.Close()
        reader.Close()

ftp://ftp.microsoft.com/
中的示例 在根目录中，它有一个子文件夹

Example in ftp://ftp.microsoft.com/
In root directory it has a sub folders

Folder1
Folder2

我想将这两个子文件夹放在ListBox中.

I want to put that two sub folders in a ListBox.