xUnit.net is a community-driven, open-source unit testing framework designed for the .NET Framework, available at no cost. Developed by the creator of NUnit v2, it represents the cutting-edge approach to unit testing for languages such as C#, F#, and VB.NET, among others. Additionally, xUnit.net integrates seamlessly with tools like ReSharper, CodeRush, TestDriven.NET, and Xamarin. As a member of the .NET Foundation, it adheres to their established code of conduct, ensuring a collaborative and respectful environment for developers. This makes xUnit.net an excellent choice for modern software development practices in the .NET ecosystem.