What’s New in Rider

Adding Docker support to a project in Rider is now easier – you can generate the Dockerfile while creating a new project. Just select Docker Support on the New project dialog if you choose ASP.NET Core Web Application, Worker Service, or Console Application.

If you want to add a Dockerfile to an existing project, use Add | Docker Support in the context menu for a project in the Solution Explorer tool window.

Out-of-the-box, Rider can run Dockerfiles generated by Visual Studio. No additional changes are required from you in the Dockerfile to make it Rider-compatible.

There’s also something to keep things neat: the Redundant 'record' type declaration body inspection and the corresponding quick-fix will replace the empty record type declaration body with a semicolon.

We’re happy to introduce a new inspection, Inline temporary variable.

Sometimes you find yourself using the same value over and over under different names in your program. Can such code be made more transparent? Sure, and Rider is here to help. It can even help you find bugs if the temporary variable was supposed to be initialized to some other value or mutated later in code.

Named tuples have been with us since C# 7, but renaming the components remained a manual operation. We’ve put an end to it – you can call the refactoring now.

Logical not patterns can help you make your type checks much easier to read. Rider offers dropping the !() syntax in favour of a not pattern.

For C# 10.0 support, we’ve taken some first steps and taught Rider to work with the Constant interpolation strings feature.

• Rider now suggests using the range operator instead of Slice and Substring, if doing so simplifies the code.
• The Namespace does not correspond to file location inspection is now suppressed in files with top-level code.
• There’s another new inspection that checks whether an auto-property can be replaced with a computed property, along with a quick-fix to make the replacement.

There’s good news for developers who work with ASP.NET MVC, ASP.NET Web API, or Razor Pages! We’ve added a scaffolding mechanism for ASP.NET Core projects.

Route templates are widely used in MVC applications to configure how HTTP requests are matched to the application’s executable endpoints. In the 2021.1 version, we’ve introduced support for route templates. Rider now provides code completion, structural navigation, inspections, and quick-fixes. It includes:

• Inspections to check HTTP syntax errors.
• Inspections and quick-fixes to check/fix route parameter issues.
• Inspections for route constraints.

Learn more at What’s New in ReSharper.

The option to delete existing files in the folder before publishing is now available. It can prevent you from being stuck with obsolete data, for example, when moving files around. Be aware that Rider will completely clean up the target location if it’s enabled.

Inspecting your CSS code with Stylelint is now easier. You can fix problems with this linter in just a few clicks. Hover over a problem in your file or place the caret on it and press Alt+Enter, then select Stylelint: Fix current file.

Additionally, you can specify a path to the configuration file in Preferences / Settings | Languages & Frameworks | Style Sheets | Stylelint.

We’ve added a new built-in browser preview that allows you to preview HTML files quickly. To open the preview, click on the icon with the Rider logo in the widget in the editor's top-right corner.

Now you can attach to a .NET process right from the Welcome Screen! No need to open a solution with the source code first. Select the Attach to process tab on the Welcome Screen, choose the .NET process you need from the list, and Rider will begin debugging it.

Rider now has interactive debugger hints! Hints in the editor not only show you what’s going on but also allow you to intervene in and interact with the debugger process through debugger hints. Click on the hint and select Set Value to enter interactive mode. You can input raw data or use other values with the help of autocompletion. Shortcuts are provided as well.

• We’ve added an option to show raw data for an object if its representation has been changed with a DebuggerBrowsable attribute.
• We've added an option to show all compiler-generated members while debugging.
• The remote debugging processes' content is now shown correctly on macOS.
• We've supported the evaluation of auto-properties when this evaluation is impossible (e.g., the code is optimized or a thread is not at a GC-safe point).

The Unreal Engine’s Cast for type-safe dynamic casting is now available as a postfix template in code completion. Rider also supports another Unreal Engine specific reflection macro – RIGVM_METHOD.

Rider now saves the Solution Explorer’s state between closing and opening the IDE, including opened nodes. You no longer need to expand the nodes manually every time you reopen a solution or restart the IDE.

The focused element will now be highlighted, so you get a little extra help when trying to find a specific UI element in an intricate UI design.

The XAML Preview tool will now respect design properties such as DesignHeight and DesignWidth when rendering previews.

We’ve added a couple of new settings:

• You can now choose whether to set a space before and within target-typed new() parentheses.
• You can specify wrapping before the assignment operator.
• You can outdent label statements.

For custom naming rules, we have updated the order in which they are applied – more specific ones now go first.

Finally, we’ve added a new Reindent only action for Format Selection. You can now tell Rider to only adjust the indents for the selected code instead of performing the whole reformatting process.

We’ve added new Inline Variable refactoring for local let bindings.

Rider can now calculate an allowed language level based on the project and compiler used in a build and suggest improvements to make your F# code more modern and up-to-date.

Redundant parentheses analysis and the corresponding quick fix will help you with parentheses in patterns, types, and simple expressions. We’re planning to cover more expression cases in future releases.

The Space plugin is now available for Rider. You can connect to your organization in JetBrains Space via Get from VCS, located right on the welcome screen. Once logged in, you can view and clone project repositories, review your teammates’ code, and write Space Automation scripts.

We’ve added a UI for editing grants when modifying objects.

The Modify user window, which you can invoke on a user in the database explorer with Ctrl+F6, now has a UI for adding grants to objects.

This is available for PostgreSQL, Redshift, Greenplum, MySQL, MariaDB, DB2, SQL Server, and Sybase.

System functions and procedures are no longer highlighted as errors when used unqualified. Navigation and completion now work for them as well.

Rider now supports building in parallel on recent versions of Mono. Please enable it in Settings | Build, Execution, Deployment | Toolset and Build.

It is now possible to configure how Rider will treat external dependencies when searching for text. In the Find in Files dialog, select Scope and click the ‘…’ button. The Scopes window will open, and in it you can see whether External Dependencies are included or excluded from the scope. You can change it using the buttons on the right.