How to clear cookie in controller ajax method mvc?

How to clear cookie in controller ajax method mvc?, someone asked me to explain?

In this article I will show you to clear cookie in ajax post method call to a controller by setting the cookie expiration date to the past date. When the user request for a page from the domain or path, the browser cookie determines that the cookie expired and removed.  

        public JsonResult LogOut()
            //Delete the authentication ticket and sign out.
            // Clearauthentication cookie.
            HttpCookie cookie = new HttpCookie(System.Web.Security.FormsAuthentication.FormsCookieName, "");
            cookie.Expires = DateTime.Now.AddYears(-1);
            return Json(new { RedirectUrl = "/Admin" });

$(function () {

$("#btnlogoff").click(function () {
                    type: 'POST',
                    url: '@Url.Action("LogOut", "Home", new { area = "admin" })',
                    data: {},
                    contentType: 'application/json; charset=utf-8',
                    dataType: 'json',
                    success: function (response) {
                        document.location =response.RedirectUrl;
                    error: function (xhr, ajaxOptions,thrownError) {

            });      });

Here, the token based authentication cookie deleted and sign out from the web application and redirect to the sign in page.

clear cookie from ajax post method using asp net mvc form authentication

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