Dependency Injection in .NET MAUI

Lifetime Decision Framework

⚠️ Avoid AddScoped in MAUI — there is no built-in scope per page. Using it without manually creating IServiceScope gives you singleton behaviour silently, which is confusing and error-prone.

Singleton traps

// ❌ ViewModel registered as Singleton — stale data across navigations
builder.Services.AddSingleton<DetailViewModel>();