How to use cookies using enterprise library

private void createCookie()
    {
        try
        {
            bool createPersistentCookie = true;
            string username = txtemailID.Text;
            string pass = txtpwd.Text;

            FormsAuthentication.Initialize();
            ////HttpCookie cookie = new HttpCookie("UserName");
            ////cookie.Value = username;
            ////cookie.Expires = DateTime.Now.AddDays(1);
            //////cookie["username"] = username;
            ////Response.Cookies.Add(cookie);
            ////string ckValue = Request.Cookies["UserName"].Value;
            HttpCookie cookie = FormsAuthentication.GetAuthCookie(username, createPersistentCookie);
            var time = DateTime.Now.AddDays(1);
            cookie.Expires = time;
            var userData = username;
            var cookieVal = FormsAuthentication.Decrypt(cookie.Value);

            FormsAuthenticationTicket aticket = new FormsAuthenticationTicket(cookieVal.Version, cookieVal.Name, cookieVal.IssueDate, time, true, userData);
            cookie.Value = FormsAuthentication.Encrypt(aticket);
            HttpContext.Current.Response.Cookies.Add(cookie);
            //HttpContext.Current.Response.Cookies.Set(cookie);
            string ckValue = null;
            //string userId = null;
            //if (this.Context.User.Identity.IsAuthenticated)
            //    userId = this.Context.User.Identity.Name;
            if (cookie != null)
            {
                ckValue = cookie.Value;//Server.HtmlEncode(cookie.Value) ;
                Response.Write(cookie.Value);
                //Session["user"] = ckValue;
            }
            //return aticket.UserData;
            FormsAuthentication.RedirectFromLoginPage("UserPost.aspx", true);
        }
        catch (Exception ex)
        {
            FormsAuthentication.SetAuthCookie(userName, createPersistentCookie);
        }
        //return aticket.UserData;
        
    }