Global Using

C# 10 introduced global using directives, a feature that simplifies namespace management by automatically importing commonly used namespaces across an entire project or specific files. With global using, developers no longer need to explicitly declare common namespaces in every file, reducing boilerplate code and improving code readability. This is particularly helpful for large projects where the same set of namespaces is used frequently. For example, in a C# project, you can add a global using for standard libraries like System.Linq or custom namespaces, making them available across all files without needing to declare them repeatedly. This reduces the risk of missing imports and enhances the overall developer experience by streamlining the development process.

In JavaScript/TypeScript, a similar effect can be achieved, but it requires additional tooling or manual effort. One common approach is to create an index.ts file that aggregates and exports modules from multiple files, which can then be imported in other parts of the application. While this reduces the number of import statements, it still requires explicit manual construction of the export module and doesn’t provide the same level of automation as C#'s global using.

Basics

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