WebRequest 访问 https

参考代码：

       [TestMethod]
        public void TestHttps()
        {
            var req =(HttpWebRequest) System.Net.WebRequest.Create("https://www.baidu.com/");
            ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
            var rep =(HttpWebResponse) req.GetResponse();
            var stream = rep.GetResponseStream();
            StreamReader reader = new StreamReader(stream);
            string content = reader.ReadToEnd();
            reader.Close();
            stream.Close();
        }

关键代码：ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };