dotnet-cqrs/docs/tutorials/modular-solution

Modular Solution Tutorial

Build a properly structured .NET solution with separated concerns.

Overview

This tutorial walks through creating a modular solution with proper layer separation:

• Api Layer - HTTP/gRPC endpoints
• CQRS Layer - Commands, queries, handlers
• Domain Layer - Entities, value objects, domain events
• Infrastructure Layer - Data access, external services

Prerequisites

• .NET 10 SDK
• Basic C# knowledge
• Understanding of CQRS pattern

Tutorial Steps

1. Solution Structure - Create project structure
2. Domain Layer - Define entities and events
3. CQRS Layer - Implement commands and queries
4. DAL Layer - Set up Entity Framework Core
5. API Layer - Configure HTTP/gRPC endpoints
6. Testing Strategy - Unit and integration tests

Final Structure

OrderManagement.sln
├── OrderManagement.Api/
├── OrderManagement.CQRS/
├── OrderManagement.Domain/
├── OrderManagement.Infrastructure/
└── OrderManagement.Tests/

See Also

• Tutorials Overview
• Architecture Overview