Is there a way to connect using a cipher suite not supported by the server?

Solution for Is there a way to connect using a cipher suite not supported by the server?
is Given Below:

I have a C# application running on a Windows 2012 R2 server that needs to post requests to a partner.
It’s failing at WebRequest.GetRequestStream() with The request was aborted: Could not create SSL/TLS secure channel.
I can get results through Postman on the same servers. My best guess is that the cause is from a mismatch of cipher suites.

From https://www.ssllabs.com/, the only supported cipher suites are:

TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f) ECDH secp256r1 (eq. 3072 bits RSA) FS 128
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030) ECDH secp256r1 (eq. 3072 bits RSA) FS 256

These two aren’t available with 2012 R2.
https://docs.microsoft.com/en-us/windows/win32/secauthn/tls-cipher-suites-in-windows-8-1

I’m seeing instructions on how to restrict cipher suites on the servers, but not adding them.

Is there a way to add new cipher suites from the program?

Please try this update on the server: https://support.microsoft.com/en-us/topic/update-adds-new-tls-cipher-suites-and-changes-cipher-suite-priorities-in-windows-8-1-and-windows-server-2012-r2-8e395e43-c8ef-27d8-b60c-0fc57d526d94 – While I cannot try it myself it looks promising.
The suites added are listed in the middle of this article.