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چگونه می توانم کلاس زیر را تبدیل به یک کلاس Generic  کنم

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication11.Helpers
{
    public static class CookieHelper
    {
        public static void AddCookie(this HttpContextBase httpContextBase, string cookieName, string value)
        {
            httpContextBase.AddCookie(cookieName, value, DateTime.Now.AddDays(30));
        }

        public static void RemoveCookie(this HttpContextBase httpContextBase, string cookieName)
        {
            var cookie = new HttpCookie(cookieName)
            {
                Expires = DateTime.Now.AddDays(-1)
            };
            httpContextBase.Response.Cookies.Set(cookie);
        }

        public static void UpdateCookie(this HttpContextBase httpContextBase, string cookieName, string value, bool httpOnly = false)
        {
            var cookie = new HttpCookie(cookieName)
            {
                Value = httpContextBase.Server.UrlEncode(value),
                HttpOnly = httpOnly
            };
            httpContextBase.Response.Cookies.Set(cookie);
        }
        public static void AddCookie(this HttpContextBase httpContextBase, string cookieName, string value, DateTime expires, bool httpOnly = false)
        {
            var cookie = new HttpCookie(cookieName)
            {
                Expires = expires,
                Value = httpContextBase.Server.UrlEncode(value),// For Cookies and Unicode characters
                HttpOnly = httpOnly
            };
            httpContextBase.Response.Cookies.Add(cookie);
        }

        public static string GetCookieValue(this HttpContextBase httpContext, string cookieName)
        {
            var cookie = httpContext.Request.Cookies[cookieName];
            if (cookie == null)
                return string.Empty; //cookie doesn't exist

            // For Cookies and Unicode characters
            return httpContext.Server.UrlDecode(cookie.Value);
        }
    }
}

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