JetBrains Rider 2025.2 Help

Convert Interface to Abstract Class refactoring

This refactoring converts interfaces into abstract classes thus helping you quickly change hierarchical dependency among a set of classes and interfaces.

Consider the following example:

interface Shape { double Area { get; } void Draw(); } class Circle : Shape { private readonly int radius; public double Area => Math.PI * Math.Pow(radius, 2); public void Draw() { //do something } }
abstract class Shape { public abstract double Area { get; } public abstract void Draw(); } class Circle : Shape { private readonly int radius; public override double Area => Math.PI * Math.Pow(radius, 2); public override void Draw() { //do something } }

Convert an interface into an abstract class

  1. Select an interface in one of the following ways:

    • In the editor, place the caret at the name of an interface.

    • Select an interface in the Solution Explorer.

    • Select an interface in the Structure window window.

  2. Do one of the following:

    • Press Ctrl+Alt+Shift+T and then choose Convert Interface to Abstract Class.

    • Choose Refactor | Convert Interface to Abstract Class from the main menu.

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

23 September 2024