调试时{“请求被中止: 未能创建 SSL/TLS 安全通道。”}

##创建路径前加这段代码

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
                    WebRequest request = WebRequest.Create(Imgurl);
                    WebResponse response = request.GetResponse();
                    Stream reader = response.GetResponseStream();

如果System中不包含Tsl12就改为

System.Net.ServicePointManager.SecurityProtocol = (SecurityProtocolType)(0xc0 | 0x300 | 0xc00);