maui-dependency-injection

To register services and ViewModels for dependency injection in .NET MAUI, configure the MauiProgram.cs file using AddSingleton, AddTransient, and AddScoped methods to centralize service lifetimes and enable Shell route auto-resolution.

Using scoped lifetimes for dependency injection in MAUI Shell navigation is generally avoided due to MAUI limitations, requiring explicit constructor injection and careful management of service lifetimes and registration order instead.

The best way to resolve platform-specific dependencies in a MAUI app is to use interface-first patterns for testability, centralizing registrations in MauiProgram.cs while avoiding platform-specific registration pitfalls to ensure clear route-based resolution.

Shell route-based resolution automatically resolves pages and their constructor injection dependencies in MAUI when services and ViewModels are properly registered in MauiProgram.cs, allowing explicit dependency wiring without manual runtime resolution.

MAUI dependency injection may fail during Shell route navigation due to incorrect service lifetime selection, improper registration order in MauiProgram.cs, or attempting to use scoped lifetimes which MAUI does not fully support.

You need interface-first patterns to make MAUI ViewModels testable because they decouple platform-specific implementations, allowing explicit constructor injection of mock dependencies during unit testing while avoiding direct service coupling.