I would like to replace all links that point to a page on facebook to have the text: "facebook page" and all other links should have the text: "website"

this is what i currently use to linkify:

Regex.Replace(pic.PictureDesc, @"((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?)","<a href=\"$1\" target=\"blank\">$1</a>")

if you could help me adjust for both rules.

thank you