Modern .NET Configuration Practices - Chris Ayers - NDC Copenhagen 2025

Value of the Information & Strength of the Argument

The talk provides high practical value for developers looking to modernize their .NET configuration practices. Chris Ayers demonstrates real-world scenarios with live code examples, showing how to move from legacy patterns to modern, testable, and secure configuration management. The argumentation is solid, grounded in official .NET documentation and best practices, and the speaker’s experience at Microsoft adds credibility. He effectively explains the evolution of configuration handling and provides clear, actionable steps for improvement. The emphasis on security, such as using user secrets and managed identities, is particularly valuable. The talk is well-structured, progressing from basics to advanced topics, and the live demos reinforce the concepts.

The title accurately reflects the content, which focuses on modern configuration practices in .NET, as presented at NDC Copenhagen 2025.

8/10

The talk is presented by a Microsoft senior software engineer with practical experience, and the content is based on official .NET documentation and best practices. The speaker demonstrates live code examples and references official Microsoft resources, but the talk is not peer-reviewed and relies on the speaker's expertise.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 02:00Introduction: Chris Ayers introduces himself and mentions that all his talks and demos are available on GitHub.
• 05:00Discussion on the evolution of configuration in .NET, contrasting legacy web.config and static ConfigurationManager with modern approaches.
• 10:00Explanation of configuration sources, providers, and builders in modern .NET, with examples of JSON, environment variables, and command-line arguments.
• 15:00Demonstration of adding configuration to a console app, including JSON files and environment variables, and showing precedence.
• 20:00Introduction to user secrets for development-time secret management, showing how to set and use them.
• 25:00Explanation of command-line configuration with mappings to hide complex nested keys, and demonstration of overriding settings.
• 30:00Introduction to strongly typed configuration and binding to classes, with examples of using GetSection and Bind.
• 35:00Deep dive into the Options pattern: IOptions, IOptionsSnapshot, and IOptionsMonitor, explaining their differences in reloading and lifetime.
• 40:00Demonstration of reloading configuration with IOptionsSnapshot and IOptionsMonitor, and the lack of reloading with IOptions.
• 45:00Discussion on named options and how to use them for multiple configurations of the same type.

• NDC Conferences — The talk was recorded at NDC Copenhagen, and this is the official conference website.
• NDC Copenhagen — The specific conference where the talk was given.

• Microsoft Learn: Configuration in .NET — The talk aligns with official Microsoft documentation on configuration.
• Microsoft Learn: Options pattern — The talk's explanation of the Options pattern matches official documentation.