XUnit is an open-source unit testing framework for the .NET Framework and .NET Core, allowing writing tests to verify pieces of your code work as expected.
XUnit is an open-source unit testing framework originally created by the .NET Foundation and released in 2009. It is used for testing .NET languages and frameworks including C#, F#, VB.NET, and ASP.NET.
Some key features of XUnit include:
XUnit is designed to be lean, extensible, and easy to learn. It aims to improve upon the older NUnit and MSTest frameworks and provides better performance and control over test execution. XUnit encourages writing small, isolated tests and helps make unit testing a key part of .NET development.