This solution is about sending notification.
You think that you have some applications (Campany A , Campany B ...) in your project and have to send notification
when a customer is registered at runtime. For example ,
Campany A wants to send a SMS notification when customer of Campany A change his/her password,
but Campany B wants to send a mail notification when customer of Campany B change his/her password at runtime.
If you dont want to use "if / else " conditional , you can use castle windsor (typed factory facility).