c# - Multiple registrations for the same decorator in a call chain -

c# - Multiple registrations for the same decorator in a call chain -

i using simpleinjector dependency injection , i've discovered can register same decorator multiple times within single phone call chain , decorator applied per requested configuration. illustration can insert repositorytracedecorator first , lastly decorator of repository class:

container.registerdecorator(typeof(irepository<>), typeof(repositorytracedecorator<>)); container.registerdecorator(typeof(irepository<>), typeof(repositorydetectchangesdecorator<>)); container.registerdecorator(typeof(irepository<>), typeof(crossrepositorytransactionscopedecorator<>)); container.registerdecorator(typeof(irepository<>), typeof(repositorytracedecorator<>)); container.registerdecorator(typeof(irepository<>), typeof(repositoryexceptiondecorator<>));

is design , hence can depend on feature?

is design , hence can depend on feature?

as shown, can useful apply decorators multiple times in chain , changing behavior in future release breaking change. can ensure you can safely depend on , behavior won't change.

what might happen in future new diagnostics feature gets improved observe , warns having multiple identical decorators.

c# dependency-injection inversion-of-control simple-injector