What is business logic?

In the context of .NET development, business logic refers to the part of an application that encapsulates the rules and operations specific to a particular business domain. It represents the logic or algorithms that govern the processing and manipulation of data to achieve specific business objectives or requirements.

Here’s a more detailed breakdown:

1. Domain-specific rules: Business logic implements the rules, policies, and constraints that govern how data is processed, validated, and manipulated within a particular domain. These rules are derived from the requirements of the business or organization for which the software is being developed.
2. Data processing: Business logic dictates how data is transformed and processed within an application to support various business operations. This includes tasks such as calculation, validation, data manipulation, and decision-making based on business rules.
3. Independence from presentation and data access: Ideally, business logic should be separate from the user interface (presentation layer) and data access layer of an application. This separation allows for better maintainability, testability, and reusability of the codebase.
4. Encapsulation and abstraction: Business logic is typically encapsulated within classes or modules, providing an abstraction layer that hides the complexities of the underlying implementation details. This abstraction enables developers to focus on the business requirements without being concerned with the technical intricacies.
5. Flexibility and scalability: Well-designed business logic should be flexible enough to accommodate changes in business rules and requirements over time. It should also be scalable to support the growth and evolution of the application as the business needs expand.

In summary, business logic forms the core of an application’s functionality, driving its behavior based on the specific requirements and rules of the business domain it serves.