Messaging

Messaging is a software architectural pattern that facilitates communication between different parts of an application. In the context of .NET MAUI and MVVM architecture, messaging is typically used to send notifications between loosely coupled components, such as between ViewModels, or from a Model to a ViewModel. This decouples the components and promotes a more modular and maintainable code base.

The concept of messaging is especially useful when data needs to be passed or events need to be communicated between parts of your application that do not have a direct relationship. Instead of tightly coupling these parts by having them directly call each other, you can use a messaging system where one part sends a message that any interested part of your application can receive and react to.

This pattern is a form of the Observer pattern, where an object, named the Subject, maintains a list of its dependents, called Observers, and notifies them automatically of any state...