HttpCookie cookie = new HttpCookie("username", "johnDoe"); cookie.Expires = DateTime.Now.AddMonths(1); HttpCookieCollection cookies = HttpContext.Current.Response.Cookies; cookies.Add(cookie);
HttpCookieCollection cookies = HttpContext.Current.Request.Cookies; if (cookies["username"] != null) { HttpCookie cookie = cookies["username"]; cookie.Expires = DateTime.Now.AddDays(-1); HttpContext.Current.Response.Cookies.Add(cookie); }This code retrieves the HttpCookieCollection from the Request object. It checks if a cookie with the name "username" exists in the collection. If it does, it retrieves the cookie object and sets its expiration date to one day ago. Finally, it adds the cookie to the HttpCookieCollection of the Response object, effectively deleting it. The package library for this class is System.Web, which is a part of the .NET framework.