Explain the concepts of inversion of control (IoC) and dependency injection (DI) in .NET.

Inversion of Control (IoC) is a design principle where control is inverted from the application to a framework. Dependency Injection (DI) is a specific implementation of IoC, where dependencies are injected into a class rather than created internally. In .NET, I use the built-in DI container to manage and inject dependencies, promoting modular and testable code.