Events

You can think of an event as a kind of method that gets executed in some circumstances and notifies handlers or delegates about that incident. For example, when you sign up for an email newsletter, you get emails from the website about the latest articles, blog posts, or news that are posted. These emails could be daily, weekly, monthly, yearly, or according to some other specified period of time that you have chosen. These emails are not sent by a human being manually, but by an automatic system/software. This automatic email sender can be developed using events. Now, you might think, why do I need an event for this, can't I send an email to the subscriber by a normal method? Yes, you can. However, suppose that in the near future, you also want to introduce a feature where you will be notified on the mobile app. You'd have to change the code and add the functionality...