.Net Framework 4.6.1 not defaulting to TLS 1.2

Question

Our client have recently upgrade the security protocol to TLS 1.2. Therefore We have our application upgraded to 4.6.1 expecting the security protocol will be default to TLS

Answer 1

MSDN: ServicePointManager.SecurityProtocol Property

This property selects the version of the Secure Sockets Layer (SSL) or Transport Layer Security (TLS) protocol to use for new connections that use the Secure Hypertext Transfer Protocol (HTTPS) scheme only; existing connections are not changed. Note that no default value is listed for this property, on purpose.

The security landscape changes constantly, and default protocols and protection levels are changed over time in order to avoid known weaknesses. Defaults will vary depending on individual machine configuration, and on which software is installed, and on which patches have been applied.

Taken from here