ReleaseSession property

Pointer<NativeFunction<Void Function(Pointer<OrtSession> input)>> ReleaseSession
getter/setter pair

Don't call ReleaseSession from Dllmain (because session owns a thread pool)

Implementation

external ffi.Pointer<
  ffi.NativeFunction<ffi.Void Function(ffi.Pointer<OrtSession> input)>
>
ReleaseSession;