Rider 2026.3: .NET 11 Support and JetBrains Air

JetBrains released Rider 2026.3 with day-one support for .NET 11 and C# 15, including debugging for .NET's new Runtime Async and language features such as unions, closed hierarchies, and extension indexers. The release adds JetBrains Air, an agentic development experience for directing and verifying agents inside JetBrains IDEs, plus new agent skills and the ability for agents to execute tests through the Rider MCP. Rider 2026.3 also brings game development updates including new Lua and Verse plugins, professional debugging for Godot, C++ debugger improvements including natvis, and command-line argument presets.

.NET Tools Essential productivity kit for .NET and game developers .NET Tools https://blog.jetbrains.com/dotnet/category/net-tools/ Rider 2026.3: .NET 11 Support and JetBrains Air Rider 2026.3 ships alongside the release of .NET 11 https://dotnet.microsoft.com/ with complete support on day one See the extensive list of all updates for AI, .NET, and game development on our What’s New in Rider 2026.3 https://www.jetbrains.com/rider/whatsnew/ page. JetBrains Air JetBrains Air brings a complete agentic development experience for directing and orchestrating agents and verifying their work inside JetBrains IDEs, including Rider. With Rider’s new Welcome screen, you can get started right away without opening a solution. Find out more about JetBrains Air in IDEs here https://www.jetbrains.com/air/ides/ . .NET 11 and C 15 Rider 2026.3 supports .NET 11 and C 15 https://learn.microsoft.com/dotnet/csharp/whats-new/csharp-15 out of the box. Explore the latest C features like unions, closed hierarchies, extension indexers, and more with your .NET code. Rider even includes support for debugging .NET’s new Runtime Async – you can read more about it in the What’s New in Rider 2026.3 https://www.jetbrains.com/rider/whatsnew/ key-updates .NET section. Rider AI skills Rider now supports a number of new agent skills, and agents can execute tests through the Rider MCP. You can even have Rider copy your local project configuration into new Git worktrees for parallel workflows and code reviews. Read more about it in the What’s New in Rider 2026.3 https://www.jetbrains.com/rider/whatsnew/ ai-integrations AI integrations section. Game development Rider is the ultimate IDE for game development, and 2026.3 brings even more improvements across all engines and workflows, including new Lua and Verse plugins, professional debugging for Godot, C++ debugger improvements including natvis, and command-line argument presets. See them all in the What’s New in Rider 2026.3 https://www.jetbrains.com/rider/whatsnew/ gamedev game development section. We also have a new Rider game development landing page here https://www.jetbrains.com/rider-gamedev/ . Try Rider 2026.3 You’ll find the full overview on the What’s New in Rider 2026.3 https://www.jetbrains.com/rider/whatsnew/ page. Download the latest version and let us know how it fits into your workflow in the comments below, on X https://x.com/JetBrainsRider , or on Bluesky https://bsky.app/profile/jetbrains-rider.bsky.social . Subscribe to a monthly digest curated from the .NET Tools blog: