Invert Boolean refactoring

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, that is 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:

            
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");
}

        

Invert a boolean method or property

Place the caret at the declaration or a usage of a boolean member in the editor, or select it in the File Structure window window.
Do one of the following:
- Press Control+Shift+R and then choose Invert Boolean.
- Right-click and choose Refactor | Invert Boolean from the context menu.
- Choose ReSharper | Refactor | Invert Boolean… from the main menu.
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:

Last modified: 08 April 2024