xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. Written by the original inventor of NUnit v2, xUnit.net is the latest technology for unit testing C# and F# (other .NET languages may work as well, but are unsupported). xUnit.net works with Visual Studio, Visual Studio Code, ReSharper, CodeRush, and TestDriven.NET. It is part of the .NET Foundation, and