Global using directive
A global using directive is a C# import whose namespace or type availability applies throughout all source files in a compilation.
.NET MAUI in Action
A global using statement imports a namespace for every source file in a C# project.
- How it is used
- Reduces boilerplate namespace references across repeatedly used files in a .NET MAUI project.
- How deep it goes
- Defines project-wide availability, then gives a setup procedure, but does not explore compiler or resolution internals.
- Examples
- Uses GlobalUsings.cs and the MauiStockTake.UI.Pages namespace as the concrete setup example.
- What you can do after
- Apply it via a GlobalUsings.cs file to share repeatedly used namespaces across project files.
Read how .NET MAUI in Action explains global using directive →
.NET in Action, Second Edition
A global using directive makes a namespace or type import available throughout all files in a C# compilation unit.
- How it is used
- Reduces repeated namespace imports across console applications and other projects.
- How deep it goes
- Explains source-file and project-file declarations, but does not descend into compiler implementation.
- Examples
- Uses System, Figgle, GlobalUsings.cs, and project-file Using entries as concrete examples.
- What you can do after
- Apply it via C# declarations or .csproj entries to shorten source files.
Read how .NET in Action, Second Edition explains global using directive →
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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