Onion Architecture

Onion Architecture is a software design approach that emphasizes separation of concerns. It organizes code in layers that resemble an onion, with the core at the center. The innermost layer contains the most critical logic (business rules), while outer layers handle details like user interface and data access. This structure ensures that changes in the outer layers do not affect the core logic, making the system more flexible and easier to maintain. It encourages writing code that is independent of specific technologies, promoting longevity and adaptability in software development.