ASP.NET Cookie helper

http://www.eggheadcafe.com/tutorials/aspnet/e7108c33-1cc6-48ae-9f65-cc391c8b66a7/aspnet-generic-cookie-utility-class.aspx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
 
namespace PAB.Web
{
        public static class CookieUtil
        {
 
        public static string GetCookieValue (string cookieName)
        {
          string cookieVal = String.Empty;
            cookieVal = HttpContext.Current.Request.Cookies[cookieName].Value;
           return cookieVal;
        }
 
        public static void CreateCookie (string cookieName, string value, int? expirationDays)
        {
            HttpCookie Cookie = new HttpCookie(cookieName, value);
             if ( expirationDays.HasValue )
                Cookie.Expires = DateTime.Now.AddDays(expirationDays.Value );
             HttpContext.Current.Response.Cookies.Add(Cookie);
        }
 
         public static void DeleteCookie (string cookieName)
        {
            HttpCookie Cookie = HttpContext.Current.Request.Cookies[cookieName];
             if (Cookie != null)
            {
                Cookie.Expires = DateTime.Now.AddDays(-2);
                 HttpContext.Current.Response.Cookies.Add(Cookie);
             }
        }
 
        public static bool CookieExists(string cookieName)
        {
            bool exists = false;
            HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName];
             if (cookie != null)
                exists = true;
            return exists;
        }
 
         public static Dictionary GetAllCookies()
        {
            Dictionary cookies = new Dictionary();
            foreach (string key in HttpContext.Current.Request.Cookies.AllKeys)
             {
                 cookies.Add(key, HttpContext.Current.Request.Cookies[key].Value);
             }
             return cookies;
        }
 
         public static void DeleteAllCookies ()
        {
            var x = HttpContext.Current.Request.Cookies;
            foreach (HttpCookie cook in x)
            {
                DeleteCookie(cook.Name);
            }
        }
    }
}