asp.net – HttpContext.Request.Cookies和HttpContext.Response

最初,我使用了这个：

DateTime cookieExpires = DateTime.Now.AddDays(-1);

for (int i = 0; i < HttpContext.Request.Cookies.Count; i++)
{
    HttpContext.Response.Cookies.Add(
        new HttpCookie(HttpContext.Request.Cookies[i].Name,null) { Expires = cookieExpires });
}

但是,这将导致OutOfMemoryException错误,因为for循环永远不会退出 – 每次向响应中添加一个cookie时,它也会被添加到`Request.

以下方法有效：

DateTime cookieExpires = DateTime.Now.AddDays(-1);

List<string> cookieNames = new List<string>();

for (int i = 0; i < HttpContext.Request.Cookies.Count; i++)
{
    cookieNames.Add(HttpContext.Request.Cookies[i].Name);
}

foreach (string cookieName in cookieNames)
{
    HttpContext.Response.Cookies.Add(
       new HttpCookie(cookieName,null) { Expires = cookieExpires });
}

那么,HttpContext.Request.Cookies和HttpContext.Response.Cookies之间的关系到底是什么？