# ReSharper C++: what changed from 2025 to 2026 - Product: ReSharper C++ (https://whatsnew.fyi/product/resharper-cpp) - Vendor: JetBrains - Range: changelog entries numbered after 2025.3.5.1 up to and including 2026.2.1, stable releases only - Entries below: 12 releases (newest first) - Resolved: 2025 is 2025.3.5.1 and 2026 is 2026.2.1, the newest stable release of each major we track - Carrying security changes: 1 · CVEs mentioned: 0 · Mentioning breaking changes: 0 · Removing or deprecating something: 0 - Page: https://whatsnew.fyi/product/resharper-cpp/compare/2025...2026 What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. ## What changed (37 changes, grouped by kind) ### Added #### 2026.2.1 (2026-08-19) - OOP mode support in dotCover, which now runs OOP by default instead of forcing ReSharper to run in-process when installed - Visual dependency analysis diagramming support in OOP mode - Support for Claude Opus 5 as a model in Junie #### 2026.2 (2026-07-22) - Preview of ACP-based agent support in Visual Studio, starting with Junie, JetBrains' own LLM-agnostic agent - .editorconfig and Roslyn analyzer integration, including adjusting compiler warnings from the Alt+Enter menu - C++26 reflection support - ISPC support - New C++ inspections #### 2026.1.1 (2026-04-27) - Support for Avalonia 12 bindings - Support for null-conditional operator in Avalonia binding expressions #### 2026.1 (2026-03-30) - Monitoring tool window for unified runtime insights and issue detection - Availability in VS Code–compatible editors, including Cursor and Google Antigravity - New inspections and code style options for safer, more consistent code - New language features and inspections for C++ ### Changed #### 2026.2.1 (2026-08-19) - Out-of-Process (OOP) mode is enabled by default, unless explicitly disabled before #### 2026.2 (2026-07-22) - Out-of-Process mode is now enabled by default - dotTrace, dotMemory, and Monitoring now work in Out-of-Process mode - Improved C# analysis with more collection-expression cases - Enhanced Extract Method that detects duplicates - Revamped Import missing references popup with no flickering and smarter placement - Constexpr evaluation improvements - Faster and more memory-efficient processing of .cshtml and .razor files - Reduced startup indexing allocations #### 2026.1 (2026-03-30) - Improved support for C# extension members with new refactorings and quick-fixes - Improved nullable reference type migration support - Enhanced code completion for LoggerMessage scenarios - Better Unreal Engine support - Faster indexing, code completion, and reduced overhead - Faster startup and lower memory usage for Unreal Engine projects - Modernized completion UI, tooltips, and editor popups with better scaling ### Fixed #### 2026.2.0.2 (2026-08-03) - Fix a problem that stopped the external service for Junie AI agent, spell-checking, and SQL/NoSQL support from starting #### 2026.1.4 (2026-07-02) - Broad set of bug fixes and stability improvements #### 2026.1.2 (2026-05-19) - Multiple bug fixes for stability and performance of ReSharper and other JetBrains .NET tools #### 2026.1.1 (2026-04-27) - Fixed flickering and lag in the editor when using ReSharper with Visual Studio 18.4.0 - Values in the comma-delimited list of values macro for live templates are now preserved after reopening the template #### 2026.1 (2026-03-30) - Improved stability in Out-of-Process mode with 70+ fixes ### Security #### 2026.1.5.1 (2026-09-01) - Fixed security issues in profiling snapshot and memory dump import in dotTrace and dotMemory _4 releases carry no categorized changes yet: 2026.1.5, 2026.2.0.1, 2026.1.3, 2026.1.0.1._ ## Release notes ### 2026.1.5.1 - Date: 2026-09-01 - Version: 2026.1.5.1 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-392/ReSharper-Tools-2026.1.5.1-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1.5.1 - **security** — Fixed security issues in profiling snapshot and memory dump import in dotTrace and dotMemory ReSharper 2026.1.5.1 Bug Fixes ReSharper 2026.1.5.1 This update includes security fixes for profiling snapshot and memory dump import in dotTrace and dotMemory. ### 2026.2.1 - Date: 2026-08-19 - Version: 2026.2.1 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-386/ReSharper-Tools-2026.2.1-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.2.1 - **changed** — Out-of-Process (OOP) mode is enabled by default, unless explicitly disabled before - **added** — OOP mode support in dotCover, which now runs OOP by default instead of forcing ReSharper to run in-process when installed - **added** — Visual dependency analysis diagramming support in OOP mode - **added** — Support for Claude Opus 5 as a model in Junie ReSharper 2026.2.1 comes with: - [Out-of-Process (OOP) mode](https://blog.jetbrains.com/dotnet/2026/08/17/rider-resharper-2026-2-1/#resharper) enabled by default, unless you explicitly disabled it before. - OOP mode support in dotCover, which now runs OOP by default instead of forcing ReSharper to run in-process when installed. - [Visual dependency analysis](https://www.jetbrains.com/help/resharper/Visual_Dependency_Analysis.html) diagramming support in OOP mode. - An update to Junie that adds support for Claude Opus 5 as a model. For the full list of updates included in this release, see the [What's New page](https://www.jetbrains.com/resharper/whatsnew/). ### 2026.1.5 - Date: 2026-08-05 - Version: 2026.1.5 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-383/ReSharper-Tools-2026.1.5-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1.5 ReSharper 2026.1.5 This is a technical release due to a shared release pipeline with JetBrains Rider. Feel free to disregard this update. For more details, refer to our [release notes](https://youtrack.jetbrains.com/articles/DOTNET-A-383/ReSharper-Tools-2026.1.5-release-notes). ### 2026.2.0.2 - Date: 2026-08-03 - Version: 2026.2.0.2 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-370/ReSharper-Tools-2026.2.0.1-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.2.0.2 - **fixed** — Fix a problem that stopped the external service for Junie AI agent, spell-checking, and SQL/NoSQL support from starting ReSharper 2026.2.0.2 This build fixes a problem that stopped the external service for Junie AI agent, spell-checking, and SQL/NoSQL support from starting ([RSRP-501396](https://youtrack.jetbrains.com/issue/RSRP-501396)). This problem caused the ReSharper auxiliary service failed notification to appear. If you are upgrading from ReSharper 2026.1.X or earlier, here are the highlights of the 2026.2 release: - Preview of ACP-based agent support in Visual Studio, starting with Junie, JetBrains' own LLM-agnostic agent. - [Out-of-Process mode is now enabled by default.](https://blog.jetbrains.com/dotnet/2026/07/22/resharper-2026-2-release/#out-of-process-mode-is-now-enabled-by-default) - dotTrace, dotMemory, and Monitoring now work in Out-of-Process mode. - Improved C# analysis with more collection-expression cases and enhanced Extract Method that detects duplicates. - .editorconfig and Roslyn analyzer integration, including adjusting compiler warnings from the Alt+Enter menu. - Revamped Import missing references popup with no flickering and smarter placement. - C++ updates: C++26 reflection, constexpr evaluation improvements, ISPC support, and new inspections. - Faster, more memory-efficient processing of .cshtml and .razor files, plus reduced startup indexing allocations. For the full list of updates included in this release, [click here](https://www.jetbrains.com/resharper/whatsnew/). ### 2026.2.0.1 - Date: 2026-07-30 - Version: 2026.2.0.1 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-370/ReSharper-Tools-2026.2.0.1-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.2.0.1 ReSharper 2026.2.0.1 Release Notes ReSharper 2026.2.0.1 This update brings fixes and improvements to strengthen the ReSharper's overall stability. ### 2026.2 - Date: 2026-07-22 - Version: 2026.2 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-370/ReSharper-Tools-2026.2-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.2 - **added** — Preview of ACP-based agent support in Visual Studio, starting with Junie, JetBrains' own LLM-agnostic agent - **changed** — Out-of-Process mode is now enabled by default - **changed** — dotTrace, dotMemory, and Monitoring now work in Out-of-Process mode - **changed** — Improved C# analysis with more collection-expression cases - **changed** — Enhanced Extract Method that detects duplicates - **added** — .editorconfig and Roslyn analyzer integration, including adjusting compiler warnings from the Alt+Enter menu - **changed** — Revamped Import missing references popup with no flickering and smarter placement - **added** — C++26 reflection support - **changed** — Constexpr evaluation improvements - **added** — ISPC support - **added** — New C++ inspections - **changed** — Faster and more memory-efficient processing of .cshtml and .razor files - **changed** — Reduced startup indexing allocations ReSharper 2026.2 comes with: - Preview of ACP-based agent support in Visual Studio, starting with Junie, JetBrains' own LLM-agnostic agent. - [Out-of-Process mode is now enabled by default.](https://blog.jetbrains.com/dotnet/2026/07/22/resharper-2026-2-release/#out-of-process-mode-is-now-enabled-by-default) - dotTrace, dotMemory, and Monitoring now work in Out-of-Process mode. - Improved C# analysis with more collection-expression cases and enhanced Extract Method that detects duplicates. - .editorconfig and Roslyn analyzer integration, including adjusting compiler warnings from the Alt+Enter menu. - Revamped Import missing references popup with no flickering and smarter placement. - C++ updates: C++26 reflection, constexpr evaluation improvements, ISPC support, and new inspections. - Faster, more memory-efficient processing of .cshtml and .razor files, plus reduced startup indexing allocations. For the full list of updates included in this release, [click here](https://www.jetbrains.com/resharper/whatsnew/). ### 2026.1.4 - Date: 2026-07-02 - Version: 2026.1.4 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-358/ReSharper-Tools-2026.1.4-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1.4 - **fixed** — Broad set of bug fixes and stability improvements ReSharper 2026.1.4 This update includes a broad set of bug fixes and stability improvements for ReSharper and the .NET Tools. For the complete list of issues resolved in this build, please refer to [our release notes](https://youtrack.jetbrains.com/articles/DOTNET-A-358/ReSharper-Tools-2026.1.4-release-notes). ### 2026.1.3 - Date: 2026-06-15 - Version: 2026.1.3 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-351/ReSharper-Tools-2026.1.3-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1.3 ReSharper 2026.1.3 This update includes a broad set of bug fixes and stability improvements for ReSharper and the .NET Tools. For the complete list of issues resolved in this build, please refer to [our release notes](https://youtrack.jetbrains.com/articles/DOTNET-A-351/ReSharper-Tools-2026.1.3-release-notes). ### 2026.1.2 - Date: 2026-05-19 - Version: 2026.1.2 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-340/ReSharper-Tools-2026.1.2-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1.2 - **fixed** — Multiple bug fixes for stability and performance of ReSharper and other JetBrains .NET tools ReSharper 2026.1.2 This update contains a number of bug fixes important for the stability and performance of ReSharper and other JetBrains .NET tools. For the full list of resolved issues, please refer to [the release notes](https://youtrack.jetbrains.com/articles/DOTNET-A-340/ReSharper-Tools-2026.1.2-release-notes). ### 2026.1.1 - Date: 2026-04-27 - Version: 2026.1.1 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-322/ReSharper-Tools-2026.1.1-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1.1 - **added** — Support for Avalonia 12 bindings - **added** — Support for null-conditional operator in Avalonia binding expressions - **fixed** — Fixed flickering and lag in the editor when using ReSharper with Visual Studio 18.4.0 - **fixed** — Values in the comma-delimited list of values macro for live templates are now preserved after reopening the template ReSharper 2026.1.1 These are the most notable bug-fixes included in this build: - Support has been added for Avalonia 12 bindings [[RSRP-502879](https://youtrack.jetbrains.com/issue/RSRP-502879/Support-Avalonia-12-bindings)], and the null-conditional operator in Avalonia binding expressions [[RSRP-500877](https://youtrack.jetbrains.com/issue/RSRP-500877/Avalonia-add-support-for-null-conditional-operator-in-bindings)]. - Fixed flickering and lag in the editor when using ReSharper with Visual Studio 18.4.0. [[RSRP-503199](https://youtrack.jetbrains.com/issue/RSRP-503199/Flickering-and-lag-issues-in-ReSharper-integration-after-VS-2026-update-to-18.4.0)] - Values in the "Comma-delimited list of values" macro for live templates are now preserved after reopening the template. [[RSRP-503460](https://youtrack.jetbrains.com/issue/RSRP-503460/Comma-delimited-list-of-values-is-empty-after-upgrade)] For the complete list of issues resolved, please see our release notes. ### 2026.1.0.1 - Date: 2026-04-09 - Version: 2026.1.0.1 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-264/ReSharper-Tools-2026.1-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1.0.1 ReSharper 2026.1.0.1 This is a technical release due to a shared release pipeline with JetBrains Rider. Feel free to disregard this update. ### 2026.1 - Date: 2026-03-30 - Version: 2026.1 - Original notes: https://youtrack.jetbrains.com/articles/DOTNET-A-264/ReSharper-Tools-2026.1-release-notes - Permalink: https://whatsnew.fyi/product/resharper-cpp/releases/2026.1 - **added** — Monitoring tool window for unified runtime insights and issue detection - **added** — Availability in VS Code–compatible editors, including Cursor and Google Antigravity - **added** — New inspections and code style options for safer, more consistent code - **added** — New language features and inspections for C++ - **changed** — Improved support for C# extension members with new refactorings and quick-fixes - **changed** — Improved nullable reference type migration support - **changed** — Enhanced code completion for LoggerMessage scenarios - **changed** — Better Unreal Engine support - **changed** — Faster indexing, code completion, and reduced overhead - **changed** — Faster startup and lower memory usage for Unreal Engine projects - **changed** — Modernized completion UI, tooltips, and editor popups with better scaling - **fixed** — Improved stability in Out-of-Process mode with 70+ fixes ReSharper 2026.1 comes with: - Monitoring tool window for unified runtime insights and issue detection [dotUltimate]. - Availability in VS Code–compatible editors, including Cursor and Google Antigravity. - Improved support for C# extension members with new refactorings and quick-fixes. - New inspections and code style options for safer, more consistent code. - Faster indexing, code completion, and reduced overhead. - Improved nullable reference type migration support. - Enhanced code completion for LoggerMessage scenarios. - C++ updates, including new language features, inspections, and better Unreal Engine support. - Faster startup and lower memory usage for Unreal Engine projects. - Improved stability in Out-of-Process mode with 70+ fixes. - Modernized completion UI, tooltips, and editor popups with better scaling. For the full list of updates included in this release, [click here](https://www.jetbrains.com/resharper/whatsnew/).