c#下载网页源码的两种方法

static class WebFunc
{
private static CookieContainer cookie = new CookieContainer();
private static string contentType = "application/x-www-form-urlencoded";
private static string accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";
private static string userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)";

/// <summary>
///
/// </summary>
/// <param name="url">网页地址</param>
/// <param name="encoding">编码方式</param>
/// <returns></returns>
public static string GetHtmlEx(string url, Encoding encoding)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.UserAgent = userAgent;
request.ContentType = contentType;
request.CookieContainer = cookie;
request.Accept = accept;
request.Method = "get";

WebResponse response = request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream, encoding);
String html = reader.ReadToEnd();
response.Close();

return html;
}
}

System.Net.WebClient wc = new System.Net.WebClient();
Byte[] pageData = wc.DownloadData("网页地址");
string s= System.Text.Encoding.Default.GetString(pageData);
//s = System.Text.Encoding.UTF8.GetString(pageData);去除中文乱码