c# - Need to modify my Regex to ignore iframe tags -

hi have free text editor blog posts on website c# code behind. use following regular expression strip html tags out of post security:

regex.replace(value, @"<(.|\n)*?>", string.empty);

however have requirement allow embedding of youtube videos, use iframe, example:

<iframe width="425" height="349" src="http://www.youtube.com/embed/ttbhgiumumu" frameborder="0" allowfullscreen></iframe>

could me modify regex allow this?

try one:

<(?!/?iframe)(.|\n)*?>

the (?!/?iframe) negative lookahead, checks < not followed iframe or /iframe.

Expalin