static void Main()
{
//将web响应写入磁盘
//WebRequest request=WebRequest.Create("http://manning.com");
//using (WebResponse response = request.GetResponse())
//using (Stream responseStream = response.GetResponseStream())
//using (FileStream output = File.Create("response.dat"))
//{
// StreamUtil.Copy(responseStream, output);
//}
//使用扩展方法调用：
WebRequest request = WebRequest.Create("http://manning.com");
using (WebResponse response = request.GetResponse())
using (Stream responseStream = response.GetResponseStream())
using (FileStream output = File.Create("response.dat"))
{
//responseStream.CopyTo(output);//没有使用扩展方法
StreamUtil.CopyTo(responseStream, output);
}
Console.ReadKey();
}