100% Free
🎯 3200+ Questions. One Goal: Your Success Sign In Sign Up

Explain the Application Lifetime events in ASP.NET Core (IHostApplicationLifetime).

Junior .NET Core
Quick Answer IHostApplicationLifetime provides three events: ApplicationStarted (app is fully started), ApplicationStopping (shutdown triggered, still running), ApplicationStopped (shutdown complete). Use these to run startup logic (warm caches) or cleanup (flush logs, close connections). Inject IHostApplicationLifetime wherever you need lifecycle hooks.

Answer

IHostApplicationLifetime (renamed to IHostApplicationLifetime / IHostApplicationLifetime in newer versions) exposes three key notifications:

  • ApplicationStarted – Fired when the app is fully started and ready to serve requests.
  • ApplicationStopping – Fired when the app begins a graceful shutdown (e.g., SIGTERM in containers).
  • ApplicationStopped – Fired when shutdown is complete and cleanup has finished.

These events are used to warm up caches, start or stop background tasks, flush logs, and release resources in cloud and container environments.

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.

Bookmark Add to Set Notes

Want to bookmark, take notes, or join discussions?

Sign in to access all features and personalize your learning experience.

Sign In Create Account

Source: SugharaIQ

Practice Sets for .NET Core

Related Questions in .NET Core

(10 questions)
What is inheritance?
What is ASP.NET Core and why was it created?
Explain the ASP.NET Core hosting model (Host Builder + Kestrel + Startup flow).
What is Kestrel and why does ASP.NET Core use it?
Explain Middleware and the purpose of the ASP.NET Core Request Pipeline.
Why does the order of middleware matter so much?
What is Dependency Injection in ASP.NET Core and why is it built-in?
Explain the three DI lifetimes (Transient, Scoped, Singleton).
What is Configuration in ASP.NET Core and how does it work?
What is the purpose of IOptions, IOptionsSnapshot, and IOptionsMonitor?
View All .NET Core Questions
Ready to level up? Start Practice