.net 4.0 解決方式
ServicePointManager.SecurityProtocol = (SecurityProtocolType)768 | (SecurityProtocolType)3072;
.net 4.5解決方式
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
以上代碼可添加至通信調用之前,或進程啟動初始化時