如何使用c#在XML文档中添加新元素

using System.Xml;

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("path/to/your/xml/file.xml");

XmlElement newElement = xmlDoc.CreateElement("NewElement");

newElement.SetAttribute("Attribute1", "Value1");
newElement.InnerText = "Element Value";

XmlNode parentNode = xmlDoc.SelectSingleNode("XPath/Expression");

parentNode.AppendChild(newElement);

xmlDoc.Save("path/to/your/xml/file.xml");