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();