要求已經中止: 無法建立 SSL/TLS 的安全通道
System.Net.WebException: 要求已經中止: 無法建立 SSL/TLS 的安全通道
https://learn.microsoft.com/zh-cn/mem/configmgr/core/plan-design/security/enable-tls-1-2-client
ServicePointManager.SecurityProtocol =
SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12 |
SecurityProtocolType.Ssl3;
4.0的可能不支持,要用數字強制轉換。或參考https://blog.51cto.com/u_827107/2672490
ServicePointManager.SecurityProtocol = (SecurityProtocolType)192 | (SecurityProtocolType)768 | (SecurityProtocolType)3072;