有用的XML函数可以在不循环的情况下提高解析性能？C#.NET

XDocument xmlDoc = XDocument.Load("path/to/xml/file.xml");
var elements = xmlDoc.Descendants("elementName");

using (XmlReader reader = XmlReader.Create("path/to/xml/file.xml"))
{
    while (reader.Read())
    {
        if (reader.NodeType == XmlNodeType.Element && reader.Name == "elementName")
        {
            // Process the element
        }
    }
}

XmlSerializer serializer = new XmlSerializer(typeof(MyObject));
using (FileStream fs = new FileStream("path/to/xml/file.xml", FileMode.Open))
{
    MyObject obj = (MyObject)serializer.Deserialize(fs);
    // Process the object
}

XDocument xmlDoc = XDocument.Load("path/to/xml/file.xml");
var elements = xmlDoc.XPathSelectElements("//elementName");