The SSL connection could not be established

Question

Facing the below error while invoking a TLS enabled REST API by .NetCore 3.1 HttpClient using client certificates.

The Curl command using client certificates works perfectly fine.

ERROR -

The SSL connection could not be established, see inner exception.

Inner Exception 1:
IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..

Inner Exception 2:
SocketException: An existing connection was forcibly closed by the remote host.

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I tried below options to resolve the issue but no success.

1. System.Net.ServicePointManager.Expect100Continue = false;
2. System.Net.ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12;