ReSharper 2018.2 Help

Convert Static to Extension Method refactoring

ReSharper | Refactor | Convert | Static to Extension Method…
ReSharper_Static2ExtensionAction

This refactoring helps you convert a static method to an extension method, provided that the static method:

  • Has at least one parameter.

  • Resides in a non-generic, non-nested static class.

Consider the following example:

Before refactoring

After refactoring

static class Foo { public static string Reverse(string input) { var chars = input.ToCharArray(); Array.Reverse(chars); return new string(chars); } static void Test(string str) { str = Reverse(str); } }

static class Foo { public static string Reverse(this string input) { var chars = input.ToCharArray(); Array.Reverse(chars); return new string(chars); } static void Test(string str) { str = str.Reverse(); } }

To convert a static method to an extension method

  1. Place the caret at the declaration or a usage of a static method in the editor, or select it in the File Structure window.

  2. Do one of the following:
    • Press Ctrl+Shift+R and then choose Convert Static Method to Extension

    • Right-click and choose Refactor | Convert Static Method to Extension in the context menu.

    • Choose ReSharper | Refactor | Convert | Static to Extension Method… in the main menu.

  3. If no conflicts are found, ReSharper performs the refactoring immediately. Otherwise, it prompts you to resolve conflicts.

This feature is supported in the following languages and technologies:

Language: C#

Language: VB.NET

Language: C++

Language: HTML

Language: ASP.NET

Language: Razor

Language: JavaScript

Language: TypeScript

Language: CSS

Language: XML

Language: XAML

Language: Resx

Language: Build Scripts

Language: Protobuf

Language: JSON

Feature is available

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The instructions and examples given here address the use of the feature in C#. For details specific to other languages, see corresponding topics in the ReSharper by Language section.

Last modified: 5 October 2018

See Also