ReSharper Help

Convert Static to Extension Method

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 refactoringAfter refactoring
public static string Reverse(string input) { char[] chars = input.ToCharArray(); Array.Reverse(chars); return new string(chars); } void Test(string str) { str = Reverse(str); }
public static string Reverse(this string input) { char[] chars = input.ToCharArray(); Array.Reverse(chars); return new string(chars); } 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 on 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/technologies:

C# VB.NET C++ HTML ASPX Razor JavaScript TypeScript CSS XML XAML RESX Build Scripts
feature_available feature_available

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.

See Also

Last modified: 3 September 2015