HttpWebRequest 基礎鏈接已經關閉: 未能爲 SSL/TLS 安全通道創建信任關係

請求對象前加入 

 ServicePointManager.ServerCertificateValidationCallback = ValidateServerCertificate;

而後實現該方法

private static bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
　　return true;
}

 

就能夠了