---
title: "Discussion on \"Interfaces, Testing and Dependency Injection in C#\" | Hashnode"
description: "Discussion on \"Interfaces, Testing and Dependency Injection in C#\". When I first started out as developer, the usefulness of interfaces was one of the things I never quite worked out.  However, as I got more into design and testing then everything suddenly became much more clear.  By developing to interfaces we can m..."
url: "https://hashnode.com/posts/interfaces-testing-and-dependency-injection-in-c/62ab13c31a89c91850b1a8a9"
---

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# [Interfaces, Testing and Dependency Injection in C#](https://davek.dev/interfaces-testing-and-dependency-injection-in-c?utm_source=hashnode&utm_medium=feed)

When I first started out as developer, the usefulness of interfaces was one of the things I never quite worked out. However, as I got more into design and testing then everything suddenly became much more clear. By developing to interfaces we can m...

Nov 9, 2013 · 3 min read · davek.dev  
Updated Aug 15, 2022  
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## Written by

[Dave K](https://hashnode.com/@davek17)

@davek17 · Manchester, United Kingdom

  
[View profile](https://hashnode.com/@davek17)

A software developer primarily working in C#/.Net

Principal engineer. C#/.NET, AI tooling, and IoT. Always building.

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