ASP.NET Core Keyed Services (.NET 10): Ultimate DI for Multiple Implementations 🔑

Tired of using or building complex custom factories to handle multiple implementations of the same interface in ASP.NET Core?

This is your ultimate guide to mastering Keyed Services—the powerful solution introduced to the .NET Dependency Injection (DI) container. We break down the concept with practical, real-world examples built in .NET 10.

What You Will Learn:
The Problem: Why using the standard DI container fails when you have multiple services implementing a single interface (e.g., Email, SMS, Push notifications).

The Solution: Deep dive into the Keyed Services feature and how it brings cleaner architecture to your application.

Registration: How to use AddKeyedSingleton, AddKeyedScoped, and AddKeyedTransient methods with unique keys (strings or enums).

Resolution: Injecting the correct service directly into your controllers, minimal API endpoints, or constructors using the FromKeyedServices attribute.

Advanced Tip: See how to dynamically resolve services using the IKeyedServiceProvider interface for highly flexible runtime logic.

Upgrade your Dependency Injection skills and write more maintainable, flexible, and type-safe code. This is an essential feature for every serious C# and ASP.NET Core developer in the .NET 10 era.

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