I have Payflow_dotNET.dll (version 4.3.3.0) installed in the Global Assembly Cache on a Windows Server 2008 R2 machine. This library is somehow determining the TLS level to use when connecting with the PayPal URL (either payflowpro.paypal.com or pilot-payflowpro.paypal.com). How does this .dll determine the TLS level it will use? Is there something in the environment that can be set to force the TLS level it uses?
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