[HTTPS] - 请求API失败（Could not create SSL/TLS secure channel）之解决

背景

在单元测试中请求 HTTPS API 失败。

异常

Result StackTrace: 

at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)

Result Message:

System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.

解决

在请求前设置安全协议如下：

ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
// Use SecurityProtocolType.Ssl3 if needed for compatibility reasons

参考资料

https://stackoverflow.com/a/2904963

原文：https://www.cnblogs.com/jinzesudawei/p/9328211.html