private void button1_Click(object sender, EventArgs e)
        {
            foreach (var proxy in GetProxy())
            {
                System.Threading.ThreadPool.QueueUserWorkItem(PoolFunc, proxy);
            }
        }

        void PoolFunc(object proxy)
        {
            try
            {
                WebClient wc = new WebClient();
                wc.Proxy = new WebProxy(proxy.ToString());
                wc.DownloadString(this.textBox2.Text);
            }
            catch { }
        }


        private List<string> GetProxy()
        {
            List<string> list = new List<string>();

            string res = null;
            try
            {
                res = new WebClient().DownloadString(textBox1.Text);
            }
            catch
            {
            }

            Regex re = new Regex(@"([1-2][0-9]{0,2})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})(:\d{2,4})?");
            foreach (Match m in re.Matches(res))
            {
                if (!m.Value.Contains("."))
                    continue;

                if (this.checkBox1.Checked &&
                    !m.Value.EndsWith(":80"))
                    continue;

                if (list.Contains(m.Value))
                    continue;

                if (m.Value.StartsWith("http://"))
                    list.Add(m.Value);
                else
                    list.Add("http://" + m.Value);
            }

            return list;
        }