C# 是否在ASP.NET MVC中更新多值cookie？

如何在ASP.NET中更新多值cookie？

Response.AppendCookie（…）是我缺少的。谢谢。实际上更新现有cookie应该是：

Response.SetCookie（cookie）

Response.AppendCookie只是将cookie添加到集合中。

public ActionResult ModifyCookie()
{
    // Read the cookie from the request
    var cookie = Request.Cookies["cookieName"];

    // Verify that the cookie was present
    if (cookie != null)
    {
        // modify a value given the key
        cookie.Values["key"] = "modified value";

        // write the modified cookie back to the response
        Response.AppendCookie(cookie);
    }
    return View();
}