📢 DEPRECATION ANNOUNCEMENT: Polyglot Notebooks

[claudiaregio]

📢 DEPRECATION ANNOUNCEMENT: Polyglot Notebooks

The Polyglot Notebooks Extension will be deprecated on March 27th, 2026.

❓What This Means

• The extension will not be disabled or uninstalled from your VS Code.
• You can continue using the extension after the deprecation date if you don't uninstall it, but future VS Code updates may eventually break it.
• No new features will be added to Polyglot Notebooks or the .NET Interactive kernel for Jupyter notebook usage.
• Bug fixes and support will end immediately.
• The extension will be marked as deprecated in the VS Code marketplace.
• Issues in this repository related to the Polyglot Notebooks extension will be closed as not planned.
• Issues in this repository related to using .NET Interactive as a kernel in other Jupyter frontends will be closed as not planned.

✅ Recommended Action

1. Convert/migrate your existing notebooks.
   • If you were primarily working with C#: Use our newly introduced file-based apps! File-based apps let you build, run, and publish C# apps from a single C# file without creating a traditional project file. This makes file-based apps powerful for quick learning and experimenting just like Polyglot Notebooks! Follow your first tutorial here.
   • If you were primarily working with other languages: We recommend using the VS Code Jupyter extension for your notebook needs. It supports a wide range of languages and offers robust features for notebook development. You can file requests for new features or report bugs in their VS Code Jupyter GitHub Repo.
2. Uninstall the Polyglot Notebooks extension if you've migrated to another solution.

🙏 Thank You

We want to express our sincere gratitude to all the users who have supported and contributed to the Polyglot Notebooks Extension. Your feedback, bug reports, and feature requests have been invaluable in shaping the extension.

While Polyglot Notebooks may be deprecated, our mission to make C# development delightful and accessible continues in our flagship products; we're carrying that work forward through C# Dev Kit and the next generation of AI-powered coding experiences.