C#与一个彩票页面

http://www.zhcw.com/lottery/db_table_1_desc.htm 是中彩网的一个普通页面，不过这个页面要正确的下载并显示却很有点意思，下面是代码

 

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.zhcw.com/lottery/db_table_1_desc.htm");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
String characterSet = response.CharacterSet;
if (characterSet == "ISO-8859-1") // 注意字符集
{
    characterSet = "gb2312";
}
Stream stream;
if (response.ContentEncoding == "gzip") // 注意内容编码
{
    stream = new GZipStream(response.GetResponseStream(), CompressionMode.Decompress);
}
else
{
    stream = response.GetResponseStream();
}
using (StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(characterSet)))
{
    Console.Write(reader.ReadToEnd()); // OK了
}
response.Close();