嘗試在 xamarin 上使用 HttpWebReaspone 時出現 System.NullReferenceException

Question

當我在普通的控制台應用程序項目中嘗試此代碼時，它可以工作，但不能在 xamarin 上工作，異常發生在

" 使用 (HttpWebResponse 響應 = (HttpWebResponse)request.GetResponse()) "

                string html = string.Empty;
                string url = $"https://stackoverflow.com/";
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.AutomaticDecompression = DecompressionMethods.GZip;
                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                using (Stream stream = response.GetResponseStream())
                using (StreamReader reader = new StreamReader(stream))
                {
                    html = reader.ReadToEnd();
                }

Answer 1

我建議改用HttpClient

var client = new HttpClient();
var response = await client.GetAsync("http://www.contoso.com/");
string responseBody = await response.Content.ReadAsStringAsync();