How to remove all current domain cookies in MVC website?

How about this?

string[] myCookies = Request.Cookies.AllKeys;
foreach (string cookie in myCookies)
{
  Response.Cookies[cookie].Expires = DateTime.Now.AddDays(-1);
}

What about this ?

    if (Request.Cookies["cookie"] != null)
    {
        HttpCookie myCookie = new HttpCookie("cookie");
        myCookie.Expires = DateTime.Now.AddDays(-1d);
        Response.Cookies.Remove(myCookie);
    }