See: https://github.com/microsoft/win32metadata#winmd-emitter-overview https://github.com/microsoft/win32metadata#winmd-emitter-ove... It seems at least one of

See: https://github.com/microsoft/win32metadata#winmd-emitter-overview https://github.com/microsoft/win32metadata#winmd-emitter-ove... It seems at least one of their hacks is not valid in the CLR, so that bridge has been crossed. Plus they do make use of attributes.