C#获取页面内容的几种方式

var request = WebRequest.Create("http://www.baidu.com");
            request.Method = "GET";
            var response = request.GetResponse();
            using (var stream = new System.IO.StreamReader(response.GetResponseStream()))
            {
                var content = stream.ReadToEnd();//获取到远程的页面字符串
 
                Console.WriteLine(content);
            }

  var jsonToPost = "{\"name\":\"admin\",\"pwd\":\"123456\"}";
            var request = WebRequest.Create("http://www.sina.com");
            request.Method = "POST";
 
            using (var requestStream = request.GetRequestStream())
            {
                var bytes = Encoding.UTF8.GetBytes(jsonToPost);
                requestStream.Write(bytes, 0, bytes.Length);
            }
 
            var response = request.GetResponse();
            using (var stream = new System.IO.StreamReader(response.GetResponseStream()))
            {
                var content = stream.ReadToEnd();//获取 Post 返回的内容
            }

  using (var http = new HttpClient())
            {
               var content= http.GetAsync("http://www.baidu.com").GetAwaiter().GetResult()
                   .Content.ReadAsStringAsync().GetAwaiter().GetResult();
            }

  using (var http = new HttpClient())
            {
                var jsonToPost = "{\"name\":\"admin\",\"pwd\":\"123456\"}";
                var content = http.PostAsync("http://www.baidu.com", new StringContent(jsonToPost)).GetAwaiter().GetResult()
                   .Content.ReadAsStringAsync().GetAwaiter().GetResult();
            }