Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

packages.config

The old way .NET Framework projects listed their NuGet packages, in a separate file.

packages.config is the legacy package-list format for .NET Framework projects, superseded by PackageReference in SDK-style projects.