.net - Unable to set ServicePointManager.SecurityProtocol to any value -


i have existing .net console application targeting 4.6.1. have added following method update network security tls1.2.

when running getting argumentnullexception - "value cannot null. parameter name: value"

any ideas?

private static void initialise() {     servicepointmanager.securityprotocol = securityprotocoltype.tls12; }


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