ASP.NET potentially dangerous Request.Form value

Everytime I get the ”A potentially dangerous Request.Form value was detected from
the client”-error I seem to spend a couple of minutes to find the name of the web.config
property to allow posts containing HTML-tags. So I’m just gonna put it here so I know
where to find it the next time.

<configuration>
  <system .Web>
    <pages validateRequest=”false” />
  </system>
</configuration>