下载问题

[changfutao1989]

WebClient wc = new WebClient();
string content = wc.DownloadString("http://xiangce.baidu.com/index.html");
char[] chars = content.ToCharArray();
byte[] buffer = Encoding.GetEncoding("gb2312").GetBytes(chars);
content = Encoding.UTF8.GetString(buffer);
//Console.WriteLine(content);
MatchCollection matches = Regex.Matches(content, @"src:""(?<URL>http://.+/\w+\.jpg)""
");

Console.WriteLine("yes1");
foreach (Match match in matches)
{
Console.WriteLine("yes2");
if (match.Success)
{
Console.WriteLine("yes3");
Console.WriteLine(match.Groups[1].Value);
}

}

Console.WriteLine("yes4");
Console.Read();

为什么不显示图片的url
希望解释详细一点谢谢