在线求 判断IP能不能连网

Question

                                           WebProxy proxyObject = new WebProxy("221.130.18.157", 80);//str为IP地址 port为端口                        string rl;                        HttpWebRequest Request = (HttpWebRequest)WebRequest.Create("http://house60.3g.qq.com/g/s?");
                        Request.Proxy = proxyObject;
                        HttpWebResponse Response = (HttpWebResponse)Request.GetResponse();
                        Stream resStream = Response.GetResponseStream();                        StreamReader sr = new StreamReader(resStream, Encoding.UTF8);
                        Encoding code = Encoding.GetEncoding("UTF-8");                        StringBuilder sb = new StringBuilder();                        while ((rl = sr.ReadLine()) != null)
                        {
                            sb.Append(rl);
                        }                        richTextBox1.Text = "";                        string strhtml2 = sb.ToString();//抓取得到的源网页
                        string he1 = strhtml2.ToString();
                        richTextBox1.Text = stripHtml(he1);//去除html标签后得到的源网页                        Match TitleMatch1 = Regex.Match(he1, "<title>([^<]*)</title>", RegexOptions.IgnoreCase | RegexOptions.Multiline);//获取网页的标题
                        //Thread.Sleep(500);
                        label1.Text = i.ToString();
怎么判断我这个IP地址能不能连网，如果不能连网我再做其他操作

Answer 1

private bool CheckNetConnect()
        {   
            
            Ping p = new Ping();
            PingReply pr;
            pr = p.send("221.130.18.157");
            if (pr.Status != IPStatus.Success)
                return false;
            return true;
        
        }