Released: Apr 16, 2025

2025.1 での更新項目

機能

Key Updates

• Rider Goes AI
  • JetBrains AI Assistant has received a major upgrade, making AI-powered development more accessible and efficient. With this release, AI features are now free in JetBrains IDEs, including unlimited code completion, support for local models, and credit-based access to cloud-based features. A new subscription system makes it easy to scale up with AI Pro and AI Ultimate tiers.
  • This release introduces major enhancements to boost productivity and reduce repetitive work, including smarter code completion, support for new cloud models like GPT-4.1 (сoming soon), Claude 3.7, and Gemini 2.0, advanced RAG-based context awareness, and a new Edit mode for multi-file edits directly from chat.
• Repository-wide visibility in the Solution Explorer
  • Navigate your entire codebase with Rider's new Files view. This redesigned view lives alongside your Solution view. The Files view shows your complete repository structure from the root, making it easier to work with full-stack projects, configuration files, and everything else that makes up your modern development environment.
• Roslyn syntax tree visualizer
  • You can now view and explore C# syntax trees directly inside the IDE with Rider's new Roslyn syntax tree visualizer. The visualizer provides real-time tree visualization that stays synchronized with your editor. You can interactively explore nodes and inspect their properties, quickly navigate between code and corresponding tree nodes, and use comprehensive search and filtering capabilities.
• Remote development on Windows host machines
  • Starting with Rider 2025.1, remote development on Windows hosts is now supported via the JetBrains Toolbox App. While Gateway remains available for Linux connections, the full transition to the Toolbox App as the primary hub for remote development is underway.
• Unity Profiler integration
  • Rider now integrates with the Unity Profiler, bringing CPU performance insights directly into your editor. The IDE fetches CPU usage snapshots and displays them inline with your code, making it easy to spot performance hotspots as you write and debug your Unity scripts. You can navigate seamlessly from calls in the Unity Profiler hierarchy view to their corresponding methods in Rider.
• Support for .NET 10 Preview SDK
  • Support for project templates from the new SDK.
  • The ability to create, run, and debug projects targeting the new SDK.
  • Initial support for the latest preview features of both C# 14 and VB 17.13.

Code Analysis

• New inspections and quick-fixes
  • This release also brings several new inspections targeting common pitfalls and inefficiencies across different C# versions, including but not limited to:
    • New context action to convert string interpolation to concatenation.
    • Enhanced detection of code duplication patterns.
    • Improved tuple component name suggestions.
• Scoped quick-fixes for Roslyn analyzers
  • Rider 2025.1 introduces scoped quick-fixes for Roslyn analyzers, allowing you to apply fixes at the file, project, or solution level in a single action. Now, instead of repeatedly applying the same fix, you can select the scope – whether a single file, an entire project, or the full solution – directly from the quick-fix menu.
• C#14
  • Rider 2025.1 brings initial support for .NET 10 and C# 14 preview features, helping you stay ahead of the curve with the latest language enhancements.
• nameof of unbound generic types
  • Previously, using nameof required specifying all type arguments, causing unnecessary verbosity. C# 14 allows nameof(List<>) without explicitly listing type arguments. Rider now detects redundant generic type arguments in nameof expressions and provides a quick- fix to simplify them.
• First-class Span<T> conversions
  • C# 14 introduces new implicit conversions between ReadOnlySpan<T>, Span<T>, and T[], making span-based code more intuitive. Rider now fully supports these conversion rules, helping you write efficient, modern C# code.
• Modifiers on simple lambda parameters
  • With C# 14, you can now use parameter modifiers like ref, out, in, and scoped in lambda expressions without needing explicit parameter types. Rider offers a quick- fix to remove redundant type specifications.

F# Support

• Type hints
  • Inferred types are now shown for more patterns, improving clarity when working with match expressions and other pattern-using constructs.
• Code completion
  • JetBrains have rewritten various parts of F# code completion, so it now works faster, uses less memory, and provides more accurate suggestions.
• C# in-memory references
  • JetBrains have optimized building metadata, fixed issues leading to inconsistent analysis and freezes, and improved cancellation for better code editing performance.

User Experience

• Merged main menu in the main toolbar on Windows and Linux
  • For Windows and Linux users, the IDE now offers a new option to merge the main menu with the main toolbar, creating a more streamlined interface.
• Option to set automatic plugin updates
  • You can set Rider to automatically update plugins in the background. It will download all available and compatible updates and apply them the next time the IDE is restarted without additional notifications.

Performance

• Memory consumption
  • For this release, JetBrains have completely overhauled the string interning system. IDEs process an enormous number of strings, including source code, syntax elements, symbol names, and file paths, so efficient string handling is critical. The new string interning system stores, on average, four times as many unique strings as its previous iteration and consumes about half as much memory to do so, freeing up resources in large-scale .NET projects.
• Blazor and Razor improvements
  • Razor tag helpers and Blazor component support have been completely rebuilt for 2025.1. This long-needed overhaul brings a 5%–10% reduction in analysis time for large ASP.NET solutions with heavy component usage. You'll also experience fewer reanalysis events when editing .cshtml/.razor files, as well as significantly reduced false error reporting.

AI Assistant

• Improved AI completion for web frameworks
  • For the 2025.1 release JetBrains have focused on improving AI-based completion in the context of web framework components. These changes affect local full line code completion as well as cloud-based completion suggestions.
• Consistent Naming for AI-Generated Unit Tests
  • Rider now ensures that AI-generated unit tests follow existing naming conventions in your project. This improvement helps maintain consistency across your test suite, reducing the need for manual renaming and making test integration smoother and more intuitive.
• Support for more cutting-edge LLMs
  • JetBrains have added support for Claude 3.7 Sonnet and Claude 3.5 Haiku, now provisioned in Amazon Bedrock. This means you'll benefit from sharper responses, faster insights, and an even smoother experience. AI Assistant's lineup of OpenAI models now includes o1, o1-mini, and o3-mini.
• Offline mode: work with local models
  • AI Assistant gives you the flexibility to work with local models in offline mode or leverage cloud-based AI processing. Now it supports Offline mode, allowing you to work without an internet connection while still benefiting from AI-powered coding assistance. Use local models via Ollama or LM Studio for chat, code generation, commit messages, inline documentation, and more.

Debugger

• Automatic child processes attachment
  • Rider now offers automatic attachment to child and grandchild processes during .NET application debugging. When enabled in the run/debug configurations, the IDE tracks and attaches to all .NET processes spawned within the application's process tree.
• LINQ chain debugging
  • Rider 2025.1 comes with improved data visualization for LINQ expressions, making it easier for you to understand and debug complex LINQ queries directly in the debugger. You'll now be able to inspect query execution, see intermediate results, and better understand how your LINQ operations transform the data.
• Enhanced exception breakpoint configuration
  • Rider 2025.1 introduces new breakpoint setup options that allow you to configure exception breakpoints with greater precision. Now, you can:
  • Suspend based on where the exception is thrown (User code or External code).
  • Filter breakpoints by exception handlers (Unhandled, User code, or External code).
• C++
  • Rider 2025.1 comes with lots of updates for C++ debugging, which might be particularly useful for Unreal Engine development.

Run/debug

• Support for dotnet watch as a run/debug configuration
  • Rider 2025.1 introduces a dedicated run and debug configuration for dotnet watch, streamlining the development workflow for projects that need automatic rebuilding and restarting as code changes. This enhancement particularly benefits ASP.NET Core and .NET developers, as it continuously builds your application when you modify .cs, .html, or .css files. The feature also extends to test files, enabling automatic test execution whenever your code changes.
• Input/output redirection for run configurations
  • Input and output redirection for run configurations is available in Rider 2025.1. You can now easily specify a file to be used as standard input (stdin) and direct program output to a file. Additionally, you can now attach log files to a run configuration. These files will then be shown in separate tabs in the Run or Debug tool windows during program execution.
• Easier environment variable configuration with .env files
  • Rider 2025.1 simplifies the management of environment variables. Instead of manually entering variables, you can now use .env files directly in your run/debug configurations. Look for the folder icon (Browse) next to the Environment Variables field to attach your .env files. Rider will load them on the next launch. You can even use multiple files across different projects to maintain consistent configurations.

Version Control Systems

• Commit details in the diff view
  • You can now see commit details directly in the diff view. The diff dialog now displays the commit message, author, date and time, and full commit hash, giving you a clearer view of a file's history and helping you understand modifications faster.
• Option to run tools for pre-commit checks
  • You can now launch any tool to perform a pre-commit check alongside inspections and formatting. Custom checks can be configured as run configurations in the Run Configuration dialog. This helps you catch potential issues early and ensures your code meets project standards before it's committed.
• Automatic fetch when adding or modifying a Git remote
  • Rider now automatically fetches changes when you add or update a Git remote, ensuring you always have the latest branch list and commit history without needing to fetch them manually. Newly fetched branches will immediately appear in the Git branch tree. You'll be able to start working with them right away, and your repository will always be up to date.

Game Development

• NoesisGUI framework support
  • JetBrains have added support for the NoesisGUI framework for both Unreal Engine and Unity projects.
• NoesisGUI language server integration
  • Rider will use the NoesisGUI language server for code completion of XAML elements and binding expressions, as well as for highlighting errors and displaying error description tooltips. Rider will also now provide a preview of the interface described by the XAML file.
• Unreal Engine
  • While the main focus for this release was on the debugger, JetBrains still had time to work on several Unreal Engine-related updates and fixes, such as for the issue causing Rider not to run unit tests created from the ComplexTest template. Rider will now recognize and highlight UMETA and UPARAM reflection macros, providing code completion and tooltip documentation for both the macros and their attributes. JetBrains have also been working on optimizations for Blueprint indexing. JetBrains have reduced memory usage and made more parts of the process run asynchronously on a background thread. This should result in a more responsive experience while Rider indexes your Blueprints the first time a solution opens.
• Debugger
  • JetBrains have implemented many useful updates for the native debugger in this release, including significant performance improvements that make stepping in very large projects up to 50 times faster. Rider's support for Natvis files has been improved. Now, Natvis files are automatically loaded from the AppData folder, and there is a new option to specify custom locations containing more files. Rider will now recognize synthetic items in Natvis files, which means the debugger will show additional nodes when displaying the contents of a type. The debugger can now automatically attach to child processes, and custom rules can be applied to specify which child processes it should attach to or ignore.
• Detach process in debugger
  • The Detach process action now works with native applications.
• Context operator in debugger
  • You can use module.dll!expr syntax to specify the context operator for an expression, telling the debugger where to look to resolve a symbol in a variable or breakpoint. Unreal Engine projects also benefit from updates to the ReSharper C++ engine, including the new Inline Macro refactoring and the implementation of a popular request from users to allow the use of different syntax highlighting for various keywords.
• Unity
  • JetBrains have added an experimental integration with Unity's profiler. Once you've enabled it in the settings, clicking an entry in the profiler's Hierarchy view will open the file in Rider and show profile information for each line.
  • Unity version control bindings
    • The IDE now correctly recognizes the version control bindings for packages added as external folders. This means you can commit to both your main project and any external package folders that you're working with.
  • Unity color highlighting
    • Rider's color highlighting now supports the additional named colors added in Unity 6.
  • Rider's remote development support now works better with Unity projects. Specifically, the shader variants selector is now available, and the Unity Explorer view will now correctly select the open file.
  • JetBrains have made some fixes to the Rider package bundled with Unity. For example, root namespaces are no longer occasionally missing, the Unity editor log file can be opened directly from the Unity settings page, and Rider entries are no longer duplicated on Linux.
• Godot
  • Rider's support for Godot now supports .uid files, which were introduced in Godot 4.4. When files are moved with Rider or renamed with a refactoring, the corresponding .uid files are moved together to maintain project integrity.
  • Hot Reload now works for Godot C# projects, meaning that changes to C# code can be compiled and applied while the program is suspended at a breakpoint during debugging.
  • This release eliminates an unnecessary warning about a missing default constructor on abstract classes. We've also contributed a couple of pull requests to Godot to improve integration with Rider, such as one for automatically configuring an external editor's command line arguments when the selected editor is changed.

Cloud Development

• Support for Azure Function projects
  • Rider 2025.1 now supports running and debugging Azure Function projects via the .NET Aspire and the Azure Toolkit for Rider plugins.
• Support for AWS Lambda Function projects in .NET Aspire
  • The .NET Aspire plugin now also supports running and debugging AWS Lambda Function projects in Rider.
• Support for remote debugging of Azure App Services
  • Rider 2025.1 now supports remote debugging of Azure App Services projects via the Azure Toolkit for Rider plugin (Azure Functions and Azure Web Apps are supported).

Web Development

• Rider 2025.1 comes with a host of improvements for Angular, namely:
  • Enhanced support for host bindings.
  • Support for Angular 17.2 signal queries.
  • Better support for reactive forms.
  • Improved property suggestions for Angular bindings.
  • Easier refactoring between inline and external component templates.
• Proper support for Blazor WebAssembly publishing
  • Rider 2025.1 introduces proper support for Blazor WebAssembly (WASM) publishing. You can now use the .NET Publish | Publish to Folder configuration, which will use browser-wasm target runtime without encountering missing files in the output.
• TypeScript smarter quick-fix prioritization with the service-powered type engine
  • Rider now prioritizes service-powered quick fixes, especially for imports, when internal suggestions are unavailable. This ensures that relevant fixes appear first, reducing friction in resolving issues and improving the overall coding experience.

Miscellaneous

• Code With Me
  • Previously, to start a Code With Me session in Rider, you had to manually enable it using the Enable Code With Me action and performing a restart. In Rider 2025.1, this step is no longer necessary — you can start a collaborative session right away without restarting the IDE.
• JetBrains terminal: New architecture - Beta
  • The 2025.1 release introduces the reworked terminal architecture, which is available in Beta. The terminal now runs on a stable, standards-compliant core and uses the IDE's editor to render the UI.
• Decompiler
  • Rider 2025.1 brings several improvements to the decompiler, enhancing support for the latest C# features and improving code readability. Here's what's new:
    • Support for required members.
    • Added support for the new System.Threading.Lock type introduced in C# 13.
    • Support for ref fields and scoped parameter modifiers.
    • Support for allows ref struct generic anti-constraint.
    • Pattern-based using for ref struct types.
    • Support for string interpolation.
    • Certain integer constants in decompiled code now include commented hexadecimal representations for better readability.
    • Support for file-scoped namespaces.