IntelliSense completion for unimported types and extension methods

This refactoring applies to:

  • C#

  • Visual Basic

What: IntelliSense gives completion for unimported types and extension methods.

When: You want to use a type or extension methods that already has a dependency in your project but the using statement has not yet been added to your file.

Why: You don't have to manually add the using statement to your file.

How-to

  1. Once you start typing the name of a type or extension method that has a dependency in your project, IntelliSense will give you suggestions. Items from unimported namespaces would have their containing namespace shown as suffix.

    Tip

    You can show/hide items from unimported namespaces on demand, using the Expander button (Alt + A) that appears at the bottom left of the completion list. To change the default behavior, go to Tools > Options > Text Editor > C# / Basic > IntelliSense and look for Show items from unimported namespaces.

  2. Select and commit an unimported item.

    The using statement will be automatically added to your file.

    IntelliSense completion for unimported types

See also