Convert Indexer to Method refactoring

This refactoring helps you convert one or both accessors of an indexer into methods and update usages of the indexer in the current solution accordingly.

In the example below JetBrains Rider converts both getter and setter accessors of the indexer and updates the usage:

          
class BookLibrary
{
  private Book[] books = new Book[1000];

  public Book this[int index]
  {
    get => books[index];
    set => books[index] = value;
  }

  public void TestInsertBookAt(Book book, int index)
  {
    this[index] = book;
  }
}

          
class BookLibrary
{
  private Book[] books = new Book[1000];

  public void SetItem(int index, Book value) => books[index] = value;

  public Book GetItem(int index) => books[index];

  public void TestInsertBookAt(Book book, int index)
  {
    SetItem(index, book);
  }
}

Convert an indexer into a method

Place the caret at this keyword of an indexer in the editor or select an indexer in the Structure window.
Do one of the following:
- Press Control+Alt+Shift+T and then choose Convert Indexer to Method(s).
- Choose Refactor | Convert Indexer to Method(s) from the main menu.
The Convert Indexer to Method(s) dialog will open.
Use controls in the dialog to choose which accessors should be converted and to specify names for the created methods.
To apply the refactoring, click Next.
If no conflicts are found, JetBrains Rider performs the refactoring immediately. Otherwise, it prompts you to resolve conflicts.
Right after the refactoring has been completed, all changes that it makes anywhere, including other files, are registered as a single operation. So you can use the Undo action Control+Z to roll back all these changes with a single keystroke.

JetBrains Rider refactorings: Convert indexer to method

Last modified: 22 September 2022