ReSharper 2016.1 Help

Invert Boolean

ReSharper_InvertBool

This refactoring allows you to automatically modify a boolean member so that its value is inverted. If you apply this refactoring to a boolean field or a property, ReSharper lets you specify a new name and invert all its usages, i.e. if you refactor private bool isEnabled; to private bool isDisabled;, ReSharper will make sure that, for example, if(isEnabled) becomes if(!isDisabled) everywhere.
If you apply this refactoring to a boolean method, ReSharper lets you choose whether to invert its internal logic, usages, or both.

In the example below, we use this refactoring to invert the IsEven method. We specify a new name IsOdd and choose to invert both the internal logic and usages:

Before refactoringAfter refactoring
public bool IsEven(int input) { return input % 2 == 0; } public void Test(int value) { if (IsEven(value)) Console.WriteLine("\n the number is even"); }
public bool IsOdd(int input) { return input % 2 != 0; } public void Test(int value) { if (!IsOdd(value)) Console.WriteLine("\n the number is even"); }

To invert a boolean method

  1. Place the caret at the declaration or a usage of a boolean member in the editor, or select it in the File Structure Window.
  2. Do one of the following:
    • Press Ctrl+Shift+R and then choose Invert Boolean
    • Right-click and choose Refactor | Invert Boolean on the context menu.
    • Choose 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 Protobuf JSON
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.

Last modified: 19 August 2016