I need to save HTML text on a cookie and i’m getting System.Web.HttpRequestValidationException.

I’ve tried:

Adding <httpRuntime targetFramework="4.8.1" requestValidationMode="2.0" /> to my web.config file and <%@ Page validateRequest="false" to my .aspx file.

Encoding the text

HttpCookie template_html_cookie = new HttpCookie("template_html_cookie");
template_html_cookie.Value = HttpUtility.UrlEncode(template.body);
Response.Cookies.Add(template_html_cookie);

and then

string template_html = HttpUtility.UrlDecode(Request.Cookies["template_html_cookie"].Value);