I'll create a C# backend implementation based on your equipment movement management use case diagram. I'll structure the code with domain models, interfaces, services, and controllers to handle the different use cases shown in the diagram.

This C# implementation provides a complete backend for the equipment movement management system based on your use case diagram. Here's what I've included:

1. Domain Models:

   • User classes (AdminMetier, AdminIT, ResponsableUnite)
   • Equipment class with status tracking
   • Movement records (Reassignment, Disposal, Loan)
   • BusinessUnit class

2. Interfaces:

   • IMovementManager<T> - Generic interface for all movement types
   • Repository interfaces for Equipment, Users, and Units

3. Services:

   • ReassignmentService - Handles equipment reassignments
   • DisposalService - Manages equipment disposal/reform
   • LoanService - Manages equipment loans

4. Controller:

   • MovementController - Provides methods for all use cases in the diagram

5. Repository Implementation:

   • InMemoryEquipmentRepository - Simple implementation for demonstration

The code follows these principles:

• Clean separation of concerns with domain models, services, and controllers
• Generic interfaces to reduce code duplication
• Async/await pattern for all operations
• Status tracking for equipment throughout its lifecycle

To extend this system:

1. Implement proper database repositories (using Entity Framework Core)
2. Add authentication and authorization
3. Create API controllers or UI components
4. Add validation and error handling

Would you like me to explain any specific part of the implementation in more detail?

I'll provide all the files for a complete C# backend implementation based on the use case diagram. I'll split the code into separate files following a standard C# project structure:

These files provide a complete C# backend implementation for the equipment movement management system based on your use case diagram. The code is organized into a proper C# project structure with:

1. Models - Domain entities representing users, equipment, and movement records
2. Interfaces - Contracts for repositories and services
3. Services - Business logic for handling different types of equipment movements
4. Controllers - Coordination layer that exposes functionality to clients
5. Repositories - Data access layer (in-memory implementation for demonstration)
6. Program - Entry point that sets up the application

To extend this implementation:

1. Replace the in-memory repositories with actual database repositories (using Entity Framework Core)
2. Add API controllers for a web API
3. Implement authentication and authorization
4. Add validation and error handling
5. Create a user interface (web or desktop)