Layered Architectures


In C#, a common example of a layered architecture is the Model-View-Controller (MVC) pattern. This pattern separates an application into three interconnected components:


Model: Represents the application's data and business logic.

View: Represents the user interface and displays information to the user.

Controller: Handles user input, updates the model, and triggers the view to update.

This separation helps to organize code, improve maintainability, and facilitate testing. C# web frameworks like ASP.NET MVC often implement this pattern, providing a structured way to build applications.


Other examples: 

1. **Layered Architecture (N-Tier Architecture):** Separates an application into multiple layers, such as presentation layer, business logic layer, and data access layer. This promotes modularity and maintainability.


2. **Hexagonal Architecture (Ports and Adapters):** Focuses on creating an application core independent of its external interfaces. It consists of the inner core (business logic) and adapters (interfaces to the external world).


3. **Clean Architecture:** Introduced by Robert C. Martin, it emphasizes the separation of concerns through layers like Entities, Use Cases (Application/Business Logic), Interface Adapters (UI, Controllers), and Frameworks & Drivers (External frameworks and tools).


4. **Microservices Architecture:** Splits an application into small, independent services, each with its own database. Communication between services typically occurs through APIs. This approach promotes scalability and maintainability.


5. **Event-Driven Architecture:** Based on events and messages. Components communicate by producing and consuming events. This can be implemented using tools like message queues or event-driven frameworks.


6. **Service-Oriented Architecture (SOA):** Organizes an application as a collection of loosely coupled services. These services communicate over a network and can be independently developed, deployed, and scaled.


Each of these architectures has its own strengths and weaknesses, and the choice depends on the specific requirements and goals of the project.

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