How deeply does .NET MAUI in Action cover global using directive?

Defines project-wide availability, then gives a setup procedure, but does not explore compiler or resolution internals.

Global using directive

A global using statement imports a namespace for every source file in a C# project.

A global using directive imports a namespace for every source file in the same C# project, reducing repeated namespace references. C# 10 introduced global using statements. section 7.5.3

Set up project-wide namespace imports with these steps:

Add a file named GlobalUsings.cs to the project root. section 7.5.3
Remove any template content, leaving the file blank initially. section 7.5.3
Add global namespace imports as different project files require them. section 7.5.3

Importing MAUI pages globally

In the MauiStockTake project, GlobalUsings.cs can contain `global using MauiStockTake.UI.Pages;`, making the Pages namespace available throughout the project. section 7.5.3

How .NET MAUI in Action covers it

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.NET in Action, Second EditionA global using directive makes a namespace or type import available throughout all files in a C# compilation unit.

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Related concepts

using statementkind of · A using construct in C# either imports names for unqualified use or ensures that a disposable resource is released when its scope ends.
namespacepart of · A namespace is a naming context or identifier space in which names are defined and resolved, distinguishing them from names in other contexts.
scopeconfigures · Scope is the region of a program in which names are visible and can be resolved according to the language’s lookup rules.

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