using System.Xml.Linq; using Microsoft.VisualStudio.TestTools.UnitTesting; [TestClass] public class XElementTest { [TestMethod] public void TestEmptyElement() { XElement element = new XElement("empty"); element.AssertNoFields(); } [TestMethod] public void TestElementWithAttributes() { XElement element = new XElement("parent", new XAttribute("attr1", "value1"), new XAttribute("attr2", "value2"), new XElement("child", "content")); element.AssertNoFields(); } }In the example above, the AssertNoFields method is called to ensure that the "empty" element contains no fields. In the second test, an element with attributes and a child element is created and the AssertNoFields method is called to confirm that it contains no fields. The package library for the System.Xml.Linq namespace is the .NET Class Library.