vb.net 循环配对输出到listbox上 如何实现

vb.net 循环配对输出到listbox上 怎么实现
比如listbox1的内容是
www.baidu.com
www.google.com
baidu.com

listbox2的内容是
/robot.txt
/1.zip
/index.php

我想要实现
linstbox1的每行内容都与listbox2的每行内容配对后输出到listbox3 
这个过程要怎么实现

就是listbox3输出
www.biadu.com/robot.txt
www.baidu.com/1.zip
www.baidu.com/index.php
www.google.com/1.zip
www.google.com/robot.txt
www.google.com/index.php


------解决方案--------------------
关键是这个没什么难度呀，那这压根没思考吧？

VB.NET code

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

        For Each w In ListBox1.Items
            For Each u In ListBox2.Items
                ListBox3.Items.Add(CStr(w) & CStr(u))
            Next
        Next

    End Sub