示例
using System.Net;
using System.IO;
...
string requestUrl = "https://www.example.com/page.html";
HttpWebRequest request = HttpWebRequest.CreateHttp(requestUrl);
//（可选）设置HttpWebRequest的属性，例如：
request.AutomaticDecompression =DecompressionMethods.GZip| DecompressionMethods.Deflate;
request.Timeout = 2 * 60 * 1000; //2分钟（以毫秒为单位）
//提交请求，并获取响应正文。
string responseBodyFromRemoteServer;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
responseBodyFromRemoteServer = reader.ReadToEnd();
}
}
