Command Query Responsibility Segregation (CQRS)

CQRS separates read and write operations into different models.

Commands: Change state (create, update, delete). No return data beyond success/ID.

Queries: Read data. No side effects.

In .NET Core, CQRS is often implemented with mediator libraries (e.g., MediatR) and separate handlers for commands and queries.

Architecture impact: CQRS improves scalability, performance, and clarity in complex domains, especially when combined with DDD.

Reference:

Microsoft: CQRS Pattern

https://learn.microsoft.com/azure/architecture/patterns/cqrs