Domain-Driven Design (DDD) helps you model complex business problems clearly and maintainably.
🏢 What is DDD?
- Focuses on the domain (the core business logic).
- Uses a ubiquitous language: shared terms understood by developers and business experts.
- Encourages separation of concerns (domain, infrastructure, UI).
🏗️ Key Concepts
- Entities: Objects with identity (e.g., Order)
- Value Objects: Objects with value but no identity (e.g., Money)
- Aggregates: Groups of related entities treated as a unit
- Repositories: Handle data persistence for aggregates
🧩 Example
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public class Order
{
public Guid Id { get; set; }
public List<OrderItem> Items { get; set; }
// Domain logic here
}
💡 Tips
- Keep domain logic in your domain layer, not in controllers or repositories.
- Collaborate with business experts when naming and modeling.
Next: Clean Architecture in C#!
