What's New in ReSharper 2026.1

Marking a new step in the evolution of performance monitoring, ReSharper 2026.1 introduces the Monitoring tool window. This new dedicated tool window provides a clearer, more complete picture of runtime performance and offers automated issue detection to help you identify optimization opportunities.

The Monitoring tool window lets you observe key runtime metrics of your application as it runs or during debugging. It builds on the capabilities already previously available through our .NET profiling tools and Dynamic Program Analysis (DPA), but brings them together in a single view that makes it easier to evaluate runtime behavior at a glance.

ReSharper is now available for Visual Studio Code and compatible editors such as Cursor and Google Antigravity, bringing JetBrains’ C# tooling to your editor of choice.

The extension provides real-time code analysis, refactorings, and navigation for C#, XAML, Razor, and Blazor. It also includes a Solution Explorer for managing projects and source generators, as well as built-in unit testing support for NUnit, xUnit.net, and MSTest.

ReSharper 2026.1 expands its support for C# extension members, helping you work more efficiently with the evolving language features.

A new Consolidate extension members context action merges compatible extension declarations and classic extension methods into a single block. The Import extension member quick-fix has also been improved and now supports all kinds of extension members, automatically adding missing using directives when needed.

ReSharper 2026.1 introduces early support for upcoming C# language updates, helping you experiment with new syntax as the language evolves.

This release includes initial support for collection expression arguments and support for the [ExtendedLayout] attribute, ensuring ReSharper continues to work smoothly with the latest compiler innovations.

This release adds several new inspections and style options to help you write safer and more consistent code.

ReSharper now detects short-lived HttpClient instances and suggests safer reuse patterns. It also warns you when ImmutableArray<T> is used with collection initializers, which can lead to a runtime NullReferenceException.

Additional improvements include:

• A new inspection for enforcing the order of accessor methods in properties and events.
• A syntax style option for empty strings, allowing you to choose between string.Empty and "".
• Improved nullable reference type migration, with an option to insert #nullable enable automatically in new files.
• Enhanced code completion that can generate method definitions based on [LoggerMessage] attributes.

ReSharper 2026.1 improvements to C++ support include:

• Performance: Faster startup times and lower memory usage in Unreal Engine projects.
• Language support: Support for the C23/C++26 #embed directive, C++23 extended floating-point types, the C2Y _Countof operator, and other features.
• Coding assistance: Auto-import for C++20 modules and postfix completion for primitive types, literals, and user-defined literal suffixes.
• Code analysis: New inspections for out-of-order designated initializers and override visibility mismatches, update of bundled Clang-Tidy to LLVM 22.
• Unreal Engine: Richer Blueprint integration in Code Vision and Find Usages, compatibility fixes for the upcoming Unreal Engine 5.8.

Learn more about the C++ updates from the What's New in ReSharper C++ 2026.1 page.

Several editor UI elements in ReSharper have been refreshed to better align with the modern look of the Visual Studio experience.

Thanks to a redesign, the code completion UI now provides a cleaner and more consistent look within the editor.

We also modernized a number of related UI components, including parameter info popups, tooltips, and other editor popups, replacing outdated visuals and improving their appearance across themes and DPI settings.