Singleton vs Scoped – Choosing the Right Service Lifetime
- Understanding service lifetimes is crucial when building scalable and efficient applications in ASP.NET Core.
Singleton
- A Singleton service is created once and shared across the entire application lifetime.
- Best for shared resources like caching, logging, and configuration
- Must be thread-safe
Scoped
- A Scoped service is created once per request and disposed after the request ends.
- Ideal for business logic and database operations
- Prevents data leakage between requests
Key Takeaway:
- Use Singleton for global, stateless services
- Use Scoped for request-specific operations
- Choosing the right lifetime improves performance, memory usage, and application stability.