xUnit.net is an open-source unit testing framework for the .Net platform, designed to be community-focused and easily expandable, making it a popular choice for Selenium testing compared to other frameworks like NUnit and MSTest. Developed by the creators of NUnit, xUnit offers a distinct style of attributes and annotations and creates a new instance of a test class for each test, which enhances test isolation. The framework's latest version at the time of writing is 2.4.1, and it requires setting up in Visual Studio 2019, which involves installing necessary packages via the NuGet Package Manager or using Package Manager commands. This setup is essential for conducting Selenium automation testing with C#, and the tutorial provides a detailed guide on configuring both the xUnit framework and its runner in Visual Studio. The article's author, Himanshu Sheth, is a seasoned technologist and blogger who contributes actively to the tech community, sharing insights and fostering engagement through his work at LambdaTest.