Read values from cookies

const string COOKIE_NAME = "xyz";
string subject = "";
if (HttpContext.Current.Request.Cookies[COOKIE_NAME] != null)
{
    allClaims = new Dictionary<String, String>();

    HttpCookie authCookie = HttpContext.Current.Request.Cookies[COOKIE_NAME];

    NameValueCollection col = new NameValueCollection(authCookie.Values);
    String[] keyNames = col.AllKeys;
    foreach (string key in keyNames)
    {
        allClaims.Add(key, col.GetValues(key)[0]);
    }

    subject = authCookie["subject"].ToString();
}