VB RegExp Replacing Matches

I am using a regex - ]*> - to locate all ending tags in a variable containing one long string of html. I need to be able to append each ending tag with a line break and load the final results in a textbox. I have been able to test the regex and it works, but I cannot perform the replacement of the end tag with endtag + break: exp: a paragraph tag becomes a paragraph tag+line break

Thanks for anyone's assistance. Jesse