xUnit.net is a free, open-source, community-driven unit testing framework for C#, F#, and Visual Basic. The latest version, xUnit.net v3, supports .NET 8.0+ and .NET Framework 4.7.2+, making it a modern and flexible choice for developers.
It integrates seamlessly with the .NET SDK command-line tools, Visual Studio, Visual Studio Code, JetBrains Rider, NCrunch, and any environment compatible with Microsoft Testing Platform or VSTest.
As part of the .NET Foundation, xUnit.net operates under the Foundation’s Code of Conduct and is licensed under Apache 2, an OSI-approved license. The project is led by a dedicated Project Lead and supported by an active open-source community.
👉 Learn more: xUnit.net project home
🧩 Getting started: Build with the .NET SDK
💡 Want to contribute? Check out the project’s CONTRIBUTING.md and assertion library contribution workflow for details.