Default SecurityProtocol in .NET 4.5

Question

What is the default security protocol for communicating with servers that support up to TLS 1.2? Will .NET by default, choose the highest security

Answer 1

An alternative to hard-coding ServicePointManager.SecurityProtocol or the explicit SchUseStrongCrypto key as mentioned above:
You can tell .NET to use the default SCHANNEL settings with the SystemDefaultTlsVersions key,
e.g.:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319] "SystemDefaultTlsVersions"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319] "SystemDefaultTlsVersions"=dword:00000001