ASP.NET Core Dependency Injection Lifecycle

Jul 31, 2018#ASP.NET Core19

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Transient services are stateless, such as repositories in the DAL layer. Scoped services share state within the scope of a request, like services in the BLL layer or controllers. Singleton services share state throughout the entire application, like configuration or caching classes. It is important to ensure thread safety by using thread-safe data structures or locking mechanisms, and to prevent memory leaks by implementing IDisposable to release resources. If unsure of the service's state and usage scenario, Scoped can be chosen as the default lifecycle.

Transient: Stateless service, such as Repository in the DAL layer
Scoped: Service with shared state within the scope of a request, such as Service or Controller in the BLL layer
Singleton: Service with shared state throughout the entire application, such as configuration classes or cache classes
- Thread-safe, using thread-safe data structures or employing locking mechanisms in the service
- Memory leaks, utilizing IDisposable to release resources

If uncertain about the service's state and usage scenarios, Scoped can be chosen as the default lifecycle.