Code Access Security (CASE) is only supported on .Net Framework; from net5.0 onwards it is marked obsolete which causes build warnings. For now, easiest to disable the warnings. If/when fully deprecated, it may be necessary to be a bit cleverer.

…ling when not on Windows

Marshal.GetIUnknownForObject causes a CA1416 warning unless the code is only running on Windows. It is unclear how well Mono handles COM interoperability, so whether special handling is needed for Mono.

…tests for `DiagnostlicsLogger`

There are `CAS1416` errors if attempting to use `EventLog` on `net6.0` without handling to ensure the platform is Windows, hence the need to use `SupportedOSPlatform` at the class level for the DiagnosticsLogger-related classes.

…ine to solution for ease of access

… `net6.0`

Changed the generation from `net472` to `net6.0` due to errors when trying to load a `net6.0` assembly from `net472`

The sole usage of DOTNET462 (PublicApiTestCase) now uses NET6_0. There are symbols such as NET462 and NET462_OR_GREATER (supplied by the SDK) if such switching is required in future.

…teropServices.RuntimeInformation package on net462