Which API design principle is essential when creating reusable components in Sitefinity?

Separation of concerns is central to creating reusable components in Sitefinity because it promotes the idea that different aspects of a program should be handled independently. This principle helps to break down complex systems into more manageable parts, where each component addresses a specific functionality or responsibility. By adhering to this design principle, you can create components that are focused on specific tasks, which increases modularity and makes it easier to maintain, test, and reuse those components across different projects or parts of your application.

When components are designed with separation of concerns in mind, changes in one part of the system are less likely to impact other parts. This leads to a more robust and adaptable system, which is particularly important in a content management system like Sitefinity where flexibility and scalability are essential. Overall, this principle enhances the reusability of components, ensuring they can be integrated seamlessly into various parts of a Sitefinity application without significant modification.