刺手问题：求助关于删除Cookie.Domain的问题！删除cookies时无效。急急急！
目的：登录时，add或set一个cookies，退出时，删除这个cookies
问题：在不添加domain时，用cookies完成登录和退出是OK的，
　　　但加了domain后，删除cookies就不管用了。

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例如：cookies名称：MyCookies；domain域：abc.com　
登录部分代码如下：
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HttpCookie MyCo = HttpContext.Current.Request.Cookies[ "MyCookies "];
MyCo.Values.Add( "xxxxx ", "xxxxxxx ");
........
MyCo.Domain= "abc.com ";
MyCo.Expires= now.AddHours(24);
HttpContext.Current.Response.Cookies.Add(MyCo);
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登录成功，cookies也能在多个二级域名下共享使用。
但退出，就不灵了。退出部分代码如下：
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Response.Cookies[ "MyCookies "].Domain = " ";
Response.Cookies[ "MyCookies "].Domain = null;
Response.Cookies[ "MyCookies "].Values.Clear();
Response.Cookies.Remove( "MyCookies ");
Response.Cookies.Clear();
Response.Cookies[ "MyCookies "].Expires = DateTime.Now.AddHours(-24);

请问有什么解决办法么，谢谢！


[解决办法]
删除时:
HttpCookie cookie = Request.Cookies[ "MyCookies "];
Response.Cookies[ "MyCookies "].Expires = DateTime.Now.AddHours(-24);
Response.Cookies[ "MyCookies "].Domain = "abc.com ";//要和上面的一样
Response.Cookies.Add(cookie);