http请求get方法的使用

请教一下各位大神，想实现一个简单的操作：
在浏览器中输入：218.83.157.108:2701后获取网页的数据资源如何使用HttpWebRequest类来实现，下附lz自己的代码，调试的时候发现时协议没有编写正确的问题
 try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://218.83.157.108:2701");
                request.Method = "GET";
                request.ProtocolVersion = HttpVersion.Version10;
                request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; rv:9.0.1) Gecko/20100101 Firefox/9.0.1";
                //request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
                //request.Accept += "Accept-Language: zh-cn,zh;q=0.5\r\n";
                //request.Accept += "Accept-Encoding: gzip, deflate\r\n";
                //request.Accept += "Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7\r\n";
                //request.Connection = "alive";                //HttpRequestCachePolicy policy = new HttpRequestCachePolicy(HttpRequestCacheLevel.Default);
                //HttpWebRequest.DefaultCachePolicy = policy;
                //request.CachePolicy = policy;                HttpWebResponse response = (HttpWebResponse)request.GetResponse();                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
                string respHtml = reader.ReadToEnd();
                this.textBox3.Text = respHtml;
                reader.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }