Скачать или смотреть Dependency Injection in ASP.NET Core 💡 DI & Service Lifetimes Explained

In this video, we’ll break down Dependency Injection (DI) in ASP.NET Core, one of the most important design patterns for building modular, scalable, and testable applications.

👉 What you’ll learn in this video:
What is Dependency Injection (DI)?
Why DI is essential for clean architecture and unit testing
Benefits of DI: loose coupling, maintainability, and scalability
Service Lifetimes in ASP.NET Core:
Transient → new instance per request
Scoped → one instance per HTTP request
Singleton → one instance for the entire application lifetime
Real-world use cases in ASP.NET Core apps

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Timestamp:
0:00 – Why dependency injection matters
0:52 – The villain: Tight coupling explained
1:19 – The hero: What is Dependency Injection (DI)?
2:14 – Why use DI: Clean, testable, modular code
2:19 – Service registration in ASP.NET Core
2:32 – Transient lifetime (always new)
3:21 – Scoped lifetime (per request)
4:16 – Singleton lifetime (one instance for all)
5:31 – Cheat sheet & choosing the right lifetime
6:01 – Final thoughts & key takeaways

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