What is the regular expression to delete HTML comments?

I need to remove several thousand comments from an HTML document. The comments are in this form (multi-line):

<p>some HTML</p>
<!--
  FOO
  BAR
  BLAH
-->
<p>more HTML</p>

What regular expression can I use in a find/replace to return this result:

<p>some HTML</p>
<p>mo开发者_如何学运维re HTML</p>

If you have Dreamweaver, the "Clean Up HTML/XHTML" command has an option to remove Non-Dreamweaver comments. That should take care of a problem like this very easily.

If you only want to remove comments in this particular format (and leave all other comments intact):

replace(/^<\!--.*?-->$/mg, "")

The .*? is non-aggressive match. "m" flag necessary to make it multi-line (so ^ and $ will match the beginning/end of lines respectively).

If you want to remove all comments:

replace(/<\!--.*?-->/g, "")

You shouldnt use Regex for this. Try the HTML agility pack instead.
HTML Agility Pack