Inline Global Using refactoring

note

Global using directive is a C# 10.0 feature.

By default, JetBrains Rider automatically detects C# version based on the associated compiler. However, you can specify the target C# version explicitly for a project — press Alt+Enter on the project in the Solution Explorer and use the Language version selector on the Application page of the Project Properties dialog .

To set the C# version for all projects in your solution, specify it in a Directory.Build.props file in your solution directory as described here.

This refactoring allows you to replace one or more global using directives with local using directives in all files where symbols from the corresponding namespaces are used.

In the example below, we apply this refactoring to global using System.Collections; in file GlobalUsings.cs and as a result it adds the corresponding local using directives in files One.cs and Two.cs.

// GlobalUsings.cs
global using System.Linq;
global using System.Threading.Tasks;
global using System.Collections;
// One.cs
class One
{
    void Test(ArrayList list)
    {
        // do something
    }
}
// Two.cs
using System.Xml;
class Two
{
    void Test(ArrayList list,
                XmlReader reader)
    {
        // do something
    }
}

// GlobalUsings.cs
global using System.Linq;
global using System.Threading.Tasks;
// One.cs
using System.Collections;
class One
{
    void Test(ArrayList list)
    {
        // do something
    }
}
// Two.cs
using System.Collections;
using System.Xml;
class Two
{
    void Test(ArrayList list,
                XmlReader reader)
    {
        // do something
    }
}

tip

The reverse transformation from local to global using directives is available via the Extract Global Using refactoring.