调用网络服务时，是否可以在.net中使用TLS 1.2或1.1（如果1.2不可用）？

Question

I would like to be able to use TLS 1.2, if a web service requires it, but also (for the time being) make calls using TLS 1.1 to services that do not support it.

Currently we are using ServicePointManager.SecurityProtocol to set this in our code. (.net 4.0) Is this already backwards compatible? Or is it an all or nothing thing? And if so, is there some way to OR things together?

Answer 1

您可以使用按位或作为SecurityProtocolType是flag attribute来指定多个TLS。

System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12 | System.Net.SecurityProtocolType.Tls11 | System.Net.SecurityProtocolType.Tls;