c#中保存与删除cookies值

保存cookies：
 　　　　public bool SaveCookie(string str1,string str2,string str3)
        {
            HttpCookie cookies = new HttpCookie("CookieName");

            cookies.Values.Add("nickname", str1);
            cookies.Values.Add("password", str2);
            cookies.Values.Add("username", str3);
            cookies.Path = "/";
            cookies.Expires = DateTime.MaxValue;
            //将该cookie设置应用范围
            cookies.Domain = "www.baidu.com";//将cookie增加到response中
            HttpContext.Current.Response.Cookies.Add(cookies);

            return true;
        }

删除cookise：

　　　　public bool DelCookie()
        {
            // 退出登录状态
            HttpCookie cookies = HttpContext.Current.Request.Cookies["CookiesName"];
            if (cookies != null)
            {
                //过期时间设置为立即过期
                cookies.Expires = DateTime.Now.AddDays(-1);
　　　　　　　　　　//从request的cookies中移除
                if (HttpContext.Current.Request.Cookies["str1"] != null)
                {
                    HttpContext.Current.Request.Cookies.Remove("str1");
                }
                if (HttpContext.Current.Request.Cookies["str2"] != null)
                {
                    HttpContext.Current.Request.Cookies.Remove("str2");
                }
                if (HttpContext.Current.Request.Cookies["str3"] != null)
                {
                    HttpContext.Current.Request.Cookies.Remove("str3");
                } 

                HttpContext.Current.Request.Cookies.Remove("CookiesName");
                //设置cookie的作用于全域
                cookies.Domain = "www.baidu.com";
            }
            cookies = HttpContext.Current.Response.Cookies["CookiesName"];
            if (cookies != null)
            {
                //设置response的cookies过期时间为立即过期
                cookies.Expires = DateTime.Now.AddDays(-1);

                //从Response的cookies中移除
                HttpContext.Current.Response.Cookies.Remove("str1");
                HttpContext.Current.Response.Cookies.Remove("str2");
                HttpContext.Current.Response.Cookies.Remove("str3");
                HttpContext.Current.Request.Cookies.Remove("CookiesName");
                //设置cookie的作用于全域
                cookies.Domain = "www.baidu.com";
            }
            return true;
        }

在删除cookies时，有时只用request方式删除就行，有时只用response方式删除就行，最后两者都写上。