---
title: "NDC Video – Michael Feathers – Working Effectively with Legacy Code"
url: "https://osherove.com/blog/2009/8/18/ndc-video-michael-feathers-working-effectively-with-legacy-c.md"
canonical: "https://osherove.com/blog/2009/8/18/ndc-video-michael-feathers-working-effectively-with-legacy-c.html"
published: "2009-08-18T07:48:23"
updated: "2009-08-18T07:48:23"
tags: [".NET", "NDC09-Video"]
author: "Roy Osherove"
description: "another one by Michael Feathers Embedded Flash media from the original post is no longer playable."
usage: "Licensed under CC BY 4.0 — reuse, quote and adapt with attribution (Roy Osherove, link to the original page)."
license: "https://creativecommons.org/licenses/by/4.0/"
---

# NDC Video – Michael Feathers – Working Effectively with Legacy Code

By Roy Osherove August 18, 2009 In [.NET](https://osherove.com/blog/category/net), [NDC09-Video](https://osherove.com/blog/category/ndc09-video)

**Historical article** · Originally published August 18, 2009; technical details may be outdated.

another one by Michael Feathers

Embedded Flash media from the original post is no longer playable.

## Lessons on this topic

- [Testing Complex Validation Knowledge using Extract & Override](https://courses.osherove.com/courses/the-art-of-unit-testing-and-tdd-master-class-in-net/testing-complex-validation-knowledge-using-extract-and-override/) · The Art of Unit Testing & TDD Master Class in .NET
- [Extract And Override With Validation Logic](https://courses.osherove.com/courses/legacy-code-hero/extract-and-override-with-validation-logic/) · Legacy Code Hero
- [Refactoring Hardcore Skills](https://courses.osherove.com/courses/legacy-code-hero/refactoring-hardcore-skills/) · Legacy Code Hero
- [Legacy Refactoring intro](https://courses.osherove.com/courses/tdd-in-net-in-hebrew/legacy-refactoring-intro/) · TDD in .NET in Hebrew

## More in .NET

[All posts in .NET](https://osherove.com/blog/category/net)

- Aug 18, 2009

    ### [NDC Video – Robert Martin – Component Principles](https://osherove.com/blog/2009/8/18/ndc-video-robert-martin-component-principles.html)

- Aug 18, 2009

    ### [NDC Video – Robert Martin – Clean Code III – Functions](https://osherove.com/blog/2009/8/18/ndc-video-robert-martin-clean-code-iii-functions.html)

- Aug 18, 2009

    ### [NDC Video – Jeremy D. Miller – Convention Over Configuration](https://osherove.com/blog/2009/8/18/ndc-video-jeremy-d-miller-convention-over-configuration.html)

- Aug 18, 2009

    ### [NDC Video – Michael Feathers – Seven Blind Alleys in Software Design](https://osherove.com/blog/2009/8/18/ndc-video-michael-feathers-seven-blind-alleys-in-software-de.html)


---

## About the author

**Roy Osherove**: Senior Solutions Architect at AWS working on AI for production and AI-driven development; author of The Art of Unit Testing and Elastic Leadership, with about 20 years of consulting and training on unit testing, TDD, team leadership and continuous delivery.

### Sites

- [RobotPaper](https://robotpaper.ai/): This blog: AI patterns and anti-patterns, AI and coding agents, and engineering leadership.
- [osherove.com](https://osherove.com): Roy's personal site. Author of The Art of Unit Testing and Elastic Leadership; consulting and training on unit testing, TDD, team leadership and continuous delivery, plus about 20 years of blog posts.
- [The Art of Unit Testing](https://www.artofunittesting.com): The Art of Unit Testing, 3rd Edition (Manning): readable, maintainable, trustworthy unit tests, plus TDD workshops in C#, JavaScript, Java and Kotlin.
- [5whys.com](https://www.5whys.com): Roy's writing on software team leadership: self-organizing teams, surviving chaos, learning mode and the Elastic Leadership model.
- [Pipeline Driven](https://pipelinedriven.org): Continuous delivery and DevOps practices: build patterns, pipeline-friendly testing, DevOps metrics and enterprise DevOps.
- [Elastic Leadership](https://www.elasticleadership.com): Elastic Leadership, Roy's framework for software team leaders (survival, learning and self-organizing modes).

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### Contact

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### License

Licensed under CC BY 4.0 — reuse, quote and adapt with attribution (Roy Osherove, link to the original page). License: https://creativecommons.org/licenses/by/4.0/