How can avoid this "A potentially dangerous Request"
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/81991/a-potentially-dangerous-request-form-value-was-detected-from-the-client">A potentially dangerous Request.Form value was detected from the client</a>  </p>
</blockquote>



<p>A potentially dangerous Request.Form value was detected from the client (ctl00$ContentPlaceHolder1$txtPickUpOrderInstruction="...x the mail<br>1 x the mirrorValidateRequest="false".                                     2. I have too many textboxes so <code>Server.HtmlEncode(TestString);</code>.Method is not possible.Its development is over.Re work i have to reduce.</p>

<p>But i want to restrict the user to enter these special characters?(Scripts or function-in master page that will do the same)</p>
