Stale MEF cache in Visual Studio: devenv /updateconfiguration or deleting ComponentModelCache?
One stale cache, two documented rebuilds After an extension is installed, updated, or uninstalled, Visual Studio's MEF component-model cache can serve stale composition results: IntelliSense returns outdated completions, extension commands disappear from menus, or editor features misbehave. Microsoft's documentation offers two rebuilds, and choosing between