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What are general best practices for a maintainable MAUI app? How do you implement a navigation service to keep view models testable? How do you handle errors and show user-friendly messages centrally? How do you keep a MAUI codebase testable and loosely coupled? What logging and observability practices suit a MAUI app? How do you decide between native MAUI, Blazor Hybrid, and hybrid approaches for a project?
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How should you organize code in a MAUI project?

Intermediate

Answer

Use feature folders (or layered folders: Views, ViewModels, Services, Models) and consider separate class libraries for domain/core and infrastructure so logic is reusable and testable. Keep the MAUI head focused on UI. Group platform code under Platforms and shared resources under Resources.
/Features/Orders/OrdersPage.xaml
/Features/Orders/OrdersViewModel.cs
/Core/Services/IOrderService.cs
/Infrastructure/Api/OrderApiClient.cs
Real-world example Grouping each feature's view, view model, and services together makes navigation and ownership clear as the app grows.

Common follow-ups: Feature folders vs layered folders? | Why extract a core library?

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