香港空间的确很坑，网站可用性只有72.37%

今天测了下自己买的香港空间，每隔1分钟获取下网站内容，试了76次，只有55次成功拿到网页。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;namespace getsites{    class Program    {        static void Main(string[] args)        {            int i = 1;            while (true)            {                Console.WriteLine("Round:"+i.ToString()+Environment.NewLine);                string result = DownLoad_HTML.GetHtml("http://www.xxx.com/");                System.IO.File.AppendAllText(i.ToString() + ".html", result);                Thread.Sleep(60 * 1000);                i++;            }        }    }    public static class DownLoad_HTML    {        private static int FailCount = 0; //记录下载失败的次数        public static string GetHtml(string url) //传入要下载的网址        {            string str = string.Empty;            try            {                System.Net.WebRequest request = System.Net.WebRequest.Create(url);                request.Timeout = 10000; //下载超时时间                request.Headers.Set("Pragma", "no-cache");                System.Net.WebResponse response = request.GetResponse();                System.IO.Stream streamReceive = response.GetResponseStream();                Encoding encoding = Encoding.GetEncoding("gb2312");//utf-8 网页文字编码                System.IO.StreamReader streamReader = new System.IO.StreamReader(streamReceive, encoding);                str = streamReader.ReadToEnd();                streamReader.Close();            }            catch (Exception ex)            {                FailCount++;                if (FailCount > 5)                {                    System.IO.File.AppendAllText("error.log", "已下载失败" + FailCount + "次");                }                else                {                    str = GetHtml(url);                }            }            FailCount = 0; //如果能执行到这一步就表示下载终于成功了            return str;        }    }}