Entity Framework Core in Action

4 Using EF Core in business logic

This chapter covers

• Understanding business logic and its use of EF Core
• Using a pattern for building business logic
• Working through a business logic example
• Adding validation of data before it’s written to the database
• Using transactions to daisy-chain code sequences

Real-world applications are built to supply a set of services, ranging from holding a simple list of things on your computer to managing a nuclear reactor. Every real-world problem has a set of rules, often referred to as business rules, or by the more generic name domain rules (this book uses business rules).

The code you write to implement a business rule is known as business logic or domain logic. Because business rules can be complex, ...