Silver 操作Cookie

public class CookiesUtils
{
    public static void SetCookie(String key, String value)
    {
        SetCookie(key, value, null, null, null, false);
    }
    public static void SetCookie(String key, String value, TimeSpan expires)
    {
        SetCookie(key, value, expires, null, null, false);
    }
    public static void SetCookie(String key, String value, TimeSpan? expires,
        String path, String domain, bool secure)
    {
        StringBuilder cookie = new StringBuilder();
        cookie.Append(String.Concat(key, "=", value));
        if (expires.HasValue)
        {
            DateTime expire = DateTime.UtcNow + expires.Value;
            cookie.Append(String.Concat(";expires=", expire.ToString("R")));
        }
        if (!String.IsNullOrEmpty(path))
        {
            cookie.Append(String.Concat(";path=", path));
        }
        if (!String.IsNullOrEmpty(domain))
        {
            cookie.Append(String.Concat(";domain=", domain));
        }
        if (secure)
        {
            cookie.Append(";secure");
        }
        HtmlPage.Document.SetProperty("cookie", cookie.ToString()); 
    }
    public static string GetCookie(String key)
    {
        String[] cookies = HtmlPage.Document.Cookies.Split(';');
        String result = (from c in cookies
                        let keyValues = c.Split('=')
                        where keyValues.Length == 2 && keyValues[0].Trim() == key.Trim()
                        select keyValues[1]).FirstOrDefault();
        return result;
    }
    public static void DeleteCookie(String key)
    {
        DateTime expir = DateTime.UtcNow - TimeSpan.FromDays(1);
        string cookie = String.Format("{0}=;expires={1}",
            key, expir.ToString("R"));
        HtmlPage.Document.SetProperty("cookie", cookie);
    }
    public static bool Exists(String key, String value)
    {
        return HtmlPage.Document.Cookies.Contains(String.Format("{0}={1}", key, value));
    }
}

摘自于：http://kb.cnblogs.com/page/42901/3/