Answer
Best practices:
- Use correct lifetimes: Singleton, Scoped, Transient
- Prefer constructor injection
- Avoid service locator pattern
- Group and organize service registrations
Quick Answer
DI best practices: program to interfaces (inject IRepository, not Repository). Use Scoped for request-scoped state (DbContext, user context). Use Singleton for shared stateless services (HttpClient via IHttpClientFactory, configuration). Never capture Scoped in Singleton. Use AddHttpClient() for HttpClient (manages connection pooling). Avoid service locator pattern (don't inject IServiceProvider to call GetService manually).
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ