Imagine you are building a modern car. Instead of welding the engine directly to the chassis, you bolt it in. Why? Because if the engine breaks—or if you want to upgrade from a gas engine to an electric one—you don’t want to tear the whole car apart. You just unbolt the old one and slot the new one in.
In software engineering, Dependency Injection (DI) is that bolt.
If you are building applications in .NET, DI isn’t just a "nice-to-have" design pattern; it’s a core part of the framework. Let’s break down what DI is, why you need it, and how to master it in .NET.
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What on Earth is Dependency Injection?
