string[] ips = new string[] { "192.168.1.98", "192.168.1.99" };
            for (var i = 0; i < 50; i++)
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://" + ips[i % 2] + "/server.html");
                request.Host = "serveriphost.demo.com";

                using (WebResponse response = request.GetResponse())
                {
                    Console.Write($"{i.ToString().PadLeft(2, ‘ ‘)}:");

                    using (TextReader reader = new StreamReader(response.GetResponseStream()))
                    {
                        var result = reader.ReadToEnd();

                        if (result != ips[i % 2])
                            Console.WriteLine($"Host:{ips[i % 2]},Real:{result}");
                        else
                            Console.WriteLine("same.");
                    }
                }
            }
            Console.WriteLine("End.");
            Console.ReadKey();

负载均衡代码