XElement root = XElement.Load("data.xml"); // Check if the root element has a "version" attribute root.Should().HaveAttribute("version"); // Check if the root element has a child element with the name "data" root.Should().HaveElement("data"); // Check if the root element's "version" attribute has the value "1.0" root.Attribute("version").Should().HaveValue("1.0");In this code, we first load an XML document into an XElement object called "root." We then use the Should method to perform three separate assertions on this object. The first assertion checks if the root element has an attribute called "version." The second assertion checks if the root element has a child element called "data." The third and final assertion checks if the value of the root element's "version" attribute is equal to "1.0." The package library for this code is likely the FluentAssertions library, which provides a set of extension methods for making assertions in C# code.