WebClient 请求 https 页面出错:未能创建 SSL/TLS 安全通道

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

转载于:https://www.cnblogs.com/catzhou/p/11393057.html

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