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Dependency Injection: A C# Developer's Guide to DI Patterns

A Practical Introduction to Writing Loosely Coupled Code in C#.

Free Course
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About this Dependency Injection course

Are you a C# developer with some Object-Oriented Programming (OOP) and C# basics under your belt? Learn what Dependency Injection is and how it works with my course Dependency Injection: A C# Developer's Guide to DI Patterns!

In this course, we will first define Dependency Injection, understand and apply the Dependency Inversion Principle, and explore the various Dependency Injection Design Patterns, before taking a look at the .NET DI container itself.

Who is this for?

Ideal for C# developers who have some basic knowledge of Object Oriented Programming (OOP) and C#, and want to understand what dependency injection is and how it works.

Software Required

I am using .NET 9 and Visual Studio 2022 IDE for this course, though you're free to use whichever version of .NET (from .NET 8 onwards) such as .NET 10, and Visual Studio 2026 to follow along with this course.

What You Will Learn

  • Define what Dependency Injection is
  • The Dependency Inversion Principle
  • Tight coupling & some of its issues
  • Apply the Dependency Inversion Principle
  • The various Dependency injection Design Patterns
  • Object Lifetime and Interception
  • .NET DI container Basics