dotnet-project-setup (build spine)

The files that configure every project in a solution at once - the layout, .slnx, Directory.Build.props, and global.json. This spine holds only the layout and the shared build properties; everything else points out and is stated once elsewhere:

• Central package management (Directory.Packages.props) -> references/central-package-management.md.
• Local tool pinning (.config/dotnet-tools.json) -> references/local-tools.md.
• .NET Framework 4.8 project config (packages.config -> PackageReference, <LangVersion> pin, Server GC) -> references/net-framework-48.md.
• Analyzers, TreatWarningsAsErrors, .editorconfig, the CI quality gate -> dotnet-code-quality. Do not put these in Directory.Build.props here.
• CI workflows, container / dotnet pack packaging, SourceLink -> devops.
• The dotnet-ef tool's migration workflow (add / apply migrations) -> dotnet-migrate.
• Every other .NET work area -> the dotnet router (parent).

Canonical layout