ref http://www.west-wind.com/weblog/posts/481.aspx
///
/// Overridden to handle Confirmation of the order by
/// capturing the HTTP output and emailing it.
///
///
protected override void Render(HtmlTextWriter writer)
{
// *** Write the HTML into this string builder
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
HtmlTextWriter hWriter = new HtmlTextWriter(sw);
base.Render(hWriter);
// *** store to a string
string PageResult = sb.ToString();
// *** Write it back to the server
writer.Write(PageResult);
}