.net core WebRequest请求报错The SSL connection could not be established

解决方案，添加证书忽略

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

request.ServerCertificateValidationCallback = (_s, _x509s, _x509c, _ssl) => { return (true); };

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

from:https://www.cnblogs.com/real9527/p/17030336.html