dotnet-shared

To share domain models and DTOs, define them in a dedicated shared layer project and reference it from both backend and frontend. This eliminates duplication and enforces consistent entities, enums, and response contracts across layers.

Consistent validation annotations are enforced by placing data annotations on shared DTOs in a centralized project. Referencing this shared layer from API and UI layers ensures both compile-time nullable reference checks and uniform validation behavior.

The best way to structure DTOs for create, read, and update is to define separate data contracts within a shared domain layer. This approach enforces lightweight mappings between domain entities and DTOs while maintaining strict boundary contracts.

You need a shared layer to eliminate entity duplication when multiple projects require consistent domain models. Centralizing entities, DTOs, and enums in a shared project ensures compile-time consistency and uniform behavior across consumers.

You can centralize response contracts and enums by defining a shared domain model layer. This includes ActionResponse contracts and domain enums for users and orders, ensuring uniform behavior and data consistency across API and UI projects.