Here is a sample from start to finish and as part of that sample
incorporates regex.

http://www.eggheadcafe.com/articles/sql_server_2005_clr_regex.asp

Please stop copying your entire post to the Subject field.  As I
mentioned before, the text in your post is not an appropriate thing to
put in the Subject field.  In that field you should write an accurate,
concise summary describing the topic of your post.  A dozen words or
less is typical.