Dependency Injection in ASP.NET Core (AddSingleton, AddScoped, AddTransient) | .NET 10 + VS 2026

📌 Learn Dependency Injection (DI) in ASP.NET Core with real examples, full code walkthrough, and Visual Studio 2026 demo!
This .NET 10 complete tutorial explains AddSingleton, AddScoped, AddTransient, tight coupling vs loose coupling, and real-time practical examples like Car & Engine DI and CounterService lifetime demo.

If you're confused about DI, service lifetimes, constructor injection, or how ASP.NET Core resolves dependencies — this video will make everything crystal clear.

⭐ What you will learn:

✔ What is Dependency Injection?
✔ Why DI is used in ASP.NET Core
✔ Tight coupling vs loose coupling
✔ How DI reduces complexity
✔ AddSingleton vs AddScoped vs AddTransient
✔ Real-time examples in .NET 10
✔ Visual Studio 2026 full demo
✔ Car & Engine real-world analogy
✔ Constructor Injection explained
✔ DI lifetime behavior using CounterService

📂 Code Covered in This Video
ICounterService, CounterService
IEngine, PetrolEngine, Car
DI Registration in Program.cs
DI Controllers
Singleton, Scoped, Transient behavior

🔥 Who should watch this video?
.NET beginners
ASP.NET Core learners
Backend developers
Students preparing for interviews
Anyone struggling with DI concepts
Developers upgrading to .NET 10 or VS 2026

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