Clear All Cookie C# Asp.net

gistfile1.cs

 string[] myCookies = Request.Cookies.AllKeys;
    foreach (string cookie in myCookies)
    {
        var httpCookie = Response.Cookies[cookie];
        if (httpCookie != null)
        {
            httpCookie.Expires = DateTime.Now.AddYears(-10);
            Response.Cookies.Add(httpCookie);
        }
        var httpCookie1 = Response.Cookies[cookie];
        if (httpCookie1 != null)
        {
            httpCookie1.Expires = DateTime.Now.AddYears(-10);
            httpCookie1.Domain = ".kanoon.ir";
            Response.Cookies.Add(httpCookie1);
        }
    }