C# HttpClient An existing connection was forcibly closed by the remote host

Question

I\'m working on an integration with Alternative Payments using their hosted page integration. Their C# SDK does not have this integration available at the moment, but as you

Answer 1

If you are using .Net 4.0 then SecurityProtocolType.Tls11 and SecurityProtocolType.Tls2 are not defined so instead you can use the hard coded value below.

ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;