Request.ValidateInput... Code bug or documentation bug?

From: Fumiaki Yoshimatsu (fumiakiy_at_infoteria.co.jp)
Date: 04/29/03 

Date: Tue, 29 Apr 2003 10:27:54 +0900

This is the 1.1 ASP.NET issue.

On the document[1], it is said that HttpRequest.ValidateInput
"be called by your code if the validation feature is not enabled".
It seems to be wrong. Check out the aspx below:

<%@Page Language="C#" ValidateRequest="false"%>
<html><body><form runat="server">
<asp:TextBox id="text1" runat="server"/>
<asp:Button id="button1" runat="server"/>
</form>
<script runat="server">
void Page_Load(object s, EventArgs e) {
  if (IsPostBack) {
    Request.ValidateInput();
 }
}
</script></body></html>

This doesn't raise exception even if you enter script code in the textbox.
Is this a bug?

[1]
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemWebHttpRequestClassValidateInputTopic.asp?frame=true

Thanks,
Fumiaki Yoshimatsu