求教 ？

http://www.sanya2hand.com/bbs/viewthread.php?tid=50168&extra=page%3D1
http://www.003721.com/viewthread.php?tid=215445&extra=page%3D1
http://www.sinodxs.com/viewthread.php?tid=175164&extra=page%3D1
http://950260.com/bbs/viewthread.php?tid=16225&extra=page%3D1
http://qq249414540.zzl.org/bbs/viewthread.php?tid=77257&extra=page%3D1
http://www.52ttg.com/bbs/viewthread.php?tid=10209&extra=page%3D1
http://www.18cr.net/bbs/viewthread.php?tid=57479&extra=page%3D1
http://qq249414540.zzl.org/bbs/viewthread.php?tid=77256&extra=page%3D1
http://bbs.zyol.gz.cn/viewthread.php?tid=186862&extra=page%3D1
http://www.52ttg.com/bbs/viewthread.php?tid=10208&extra=page%3D1
http://blog-gps.com/viewthread.php?tid=52684&extra=page%3D1
http://www.18cr.net/bbs/viewthread.php?tid=57478&extra=page%3D1
http://www.518mir3.com/bbs/viewthread.php?tid=12936&extra=page%3D1
http://www.sinodxs.com/viewthread.php?tid=175159&extra=page%3D1
http://www.daycode.cn/viewthread.php?tid=901252&extra=page%3D1
http://www.xiheren.com/viewthread.php?tid=5382&extra=page%3D1
http://www.52view.com/viewthread.php?tid=194556&extra=page%3D1
http://www.iie.cc/cms/bbs/viewthread.php?tid=24386&extra=page%3D1
http://www.52ttg.com/bbs/viewthread.php?tid=10207&extra=page%3D1
http://bbs.mqjy.com.cn/post.php?&action=newthread&fid=267&extra=page%3D1&topicsubmit=yes
http://950260.com/bbs/viewthread.php?tid=16224&extra=page%3D1
http://78kt.com/viewthread.php?tid=371113&extra=page%3D1
http://www.18cr.net/bbs/viewthread.php?tid=57477&extra=page%3D1
http://www.daycode.cn/viewthread.php?tid=901250&extra=page%3D1
http://www.boat9.com/viewthread.php?tid=638398&extra=page%3D1
http://qq249414540.zzl.org/bbs/viewthread.php?tid=77255&extra=page%3D1
http://www.soudijia.com/bbs/viewthread.php?tid=3522&extra=page%3D1
http://www.518mir3.com/bbs/viewthread.php?tid=12935&extra=page%3D1
http://blog-gps.com/viewthread.php?tid=52683&extra=page%3D1
http://www.sinodxs.com/viewthread.php?tid=175154&extra=page%3D1
http://www.7bed.com/bbs/viewthread.php?tid=22784&extra=page%3D1
http://www.52view.com/viewthread.php?tid=194555&extra=page%3D1
http://www.52ttg.com/bbs/viewthread.php?tid=10206&extra=page%3D1
http://950260.com/bbs/viewthread.php?tid=16223&extra=page%3D1
http://www.306076932.com/viewthread.php?tid=10734&extra=page%3D1
http://www.daycode.cn/viewthread.php?tid=901247&extra=page%3D1
http://www.soudijia.com/bbs/viewthread.php?tid=3521&extra=page%3D1
http://qq249414540.zzl.org/bbs/viewthread.php?tid=77254&extra=page%3D1
在txt 中如何去除上面帖子地址后面的成论坛地址 --------------------编程问答-------------------- 在txt 中如何去除上面帖子地址后面的成论坛地址

这句解释下？

--------------------编程问答-------------------- 什么？？ --------------------编程问答-------------------- 就是去除http://www.sanya2hand.com/bbs/viewthread.php?tid=50168&extra=page%3D1
http://www.003721.com/viewthread.php?tid=215445&extra=page%3D1
http://www.sinodxs.com/viewthread.php?tid=175164&extra=page%3D1
后面的viewthread.php?tid=50168&extra=page%3D1
--------------------编程问答-------------------- http://www.sanya2hand.com/bbs/viewthread.php?tid=50168&extra=page%3D1就是把这个
viewthread.php?tid=50168&extra=page%3D1去除掉  批量的去除 --------------------编程问答--------------------

 Regex reg = new Regex(@"viewthread\.php[\s\S]*");



            MessageBox.Show(reg.Replace("http://qq249414540.zzl.org/bbs/viewthread.php?tid=77254&extra=page%3D1",""));

--------------------编程问答-------------------- 怎么去除能说明白点吗

补充：.NET技术 ,  其他语言