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Anatomy of a csproj: SDK-Style Projects, Common Properties, Items and Implicit Behaviors

An SDK-style csproj stays short thanks to the imports added by the Sdk attribute, Directory.Build.props and default globs such as **/*.cs; dotnet msbuild -getProperty shows a property's real value, -getItem shows items and -preprocess the whole file. We read Bookstore's project files, remove template duplication and show with real output why appsettings.json isn't copied in a console project, plus InvariantGlobalization, PrivateAssets and InternalsVisibleTo.