---
title: "Debug into the .NET Framework Library Source Code - It's here."
url: "https://osherove.com/blog/2008/1/17/debug-into-the-net-framework-library-source-code-its-here.md"
canonical: "https://osherove.com/blog/2008/1/17/debug-into-the-net-framework-library-source-code-its-here.html"
published: "2008-01-17T04:45:58"
updated: "2008-01-17T04:45:58"
tags: [".NET"]
author: "Roy Osherove"
description: "Debug into the .NET Framework. It's here . Here's how you configure VS 2008 to use it for debugging. \"Specifically, you can now browse and debug the source code for the following .NET Framework libraries: .NET Base…"
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/"
---

# Debug into the .NET Framework Library Source Code - It's here.

By Roy Osherove January 17, 2008 In [.NET](https://osherove.com/blog/category/net)

**Historical article** · Originally published January 17, 2008; technical details may be outdated.

Debug into the .NET Framework. [It's here](http://weblogs.asp.net/scottgu/archive/2008/01/16/net-framework-library-source-code-now-available.aspx).  Here's [how you configure](http://blogs.msdn.com/sburke/archive/2008/01/16/configuring-visual-studio-to-debug-net-framework-source-code.aspx) VS 2008 to use it for debugging.

> "Specifically, you can now browse and debug the source code for the following .NET Framework libraries:

- .NET Base Class Libraries (including System, System.CodeDom, System.Collections, System.ComponentModel, System.Diagnostics, System.Drawing, System.Globalization, System.IO, System.Net, System.Reflection, System.Runtime, System.Security, System.Text, System.Threading, etc).

- ASP.NET (System.Web, System.Web.Extensions)

- Windows Forms (System.Windows.Forms)

- Windows Presentation Foundation (System.Windows)

- ADO.NET and XML (System.Data and System.Xml) "

This is **_huge_**. Good going!

## More in .NET

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

- Apr 24, 2008

    ### [Parallel Builds with MSBuild](https://osherove.com/blog/2008/4/24/parallel-builds-with-msbuild.html)

- Feb 26, 2008

    ### [Fluent XML Library - Ultra cool, short and weet](https://osherove.com/blog/2008/2/26/fluent-xml-library-ultra-cool-short-and-weet.html)

- Jan 15, 2008

    ### [BitDiffer, anyone?](https://osherove.com/blog/2008/1/15/bitdiffer-anyone.html)

- Nov 29, 2007

    ### [IL Debug Visualizer for Compiled Lambda Expressions, MethodBase and DynamicMethod](https://osherove.com/blog/2007/11/29/il-debug-visualizer-for-compiled-lambda-expressions-methodba.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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### 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/