ReSharper 2017.2 Help

Making Auto-Properties Get-Only

Starting from C# 6.0, you can define get-only auto-properties, which (similarly to readonly fields) can be only initialized via a constructor or an initializer. ReSharper detects and helps you remove the redundant set accessor on auto-properties that are initialized from the constructor/initializer and have no write usages.

Make auto-property get-only fix

If you do not want ReSharper to suggest this, you can disable the code inspection that detects it (Auto-property can be made get-only).

The reverse functionality is also available. If you decide to change the value of a get-only property later in your code (which leads to a compiler error), ReSharper detects the error and suggests fixing it by adding the setter for the property:

add setter accessor fix

Another option to make auto-properties get-only in a bulk mode is code cleanup. You can either run code cleanup with the default profile Default: Full Cleanup or run the cleanup with a custom profile solely targeted at your specific task as described below.

To remove setters from auto-properties that only have read access

  1. Select ReSharper | Options in the main menu.
  2. Go to the Code Cleanup settings page: Code Editing | Code Cleanup.
  3. Create a new profile as described in the Code Cleanup section. In the Selected profile settings section for the new profile, tick the Make auto-property get-only, if possible check box. Optionally, you can enable other code cleanup tasks in this profile.
  4. Click Save to apply the modifications and let ReSharper choose where to save them, or save the modifications to a specific settings layer using the Save To drop-down list. For more information, see managing and sharing resharper settings.
  5. Select the scope where you want to make auto-properties get-only:
    • Set the caret anywhere in the file to make auto-properties get-only to the file.
    • Select one or more items in the Solution Explorer to make auto-properties get-only in the files under these nodes and their child items.
  6. Do one of the following:
    • Press Ctrl+Alt+F or choose ReSharper | Edit | Cleanup Code in the main menu.
    • Right-click anywhere in the text editor or right-click the selection and choose Cleanup Code in the context menu.
  7. In the Code Cleanup dialog that opens, select the newly created profile.
  8. Click Run. ReSharper will make auto-properties get-only in the selected scope.

If you want to make auto-properties get-only without opening the Code Cleanup dialog, you can bind the created profile to the silent cleanup and run it simply by pressing Ctrl+Shift+Alt+F. You can also create a custom cleanup profile that would combine making properties get-only with other code style tasks.

This feature is supported in the following languages and technologies:

Language: C# Language: VB.NET Language: C++ Language: HTML Language: ASP.NET Language: Razor Language: JavaScript Language: TypeScript Language: CSS Language: XML Language: XAML Language: Resx Language: Build Scripts Language: Protobuf Language: JSON
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Last modified: 14 December 2017
Making Fields ReadonlyRefactorings

See Also

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