是否可以使用xpath和c#忽略大小写？

using System;
using System.Xml;
using System.Xml.XPath;

class Program
{
    static void Main()
    {
        string xml = "<root><NodeName>Value</NodeName></root>";
        XmlDocument doc = new XmlDocument();
        doc.LoadXml(xml);

        XPathNavigator navigator = doc.CreateNavigator();
        XPathNodeIterator iterator = navigator.Select("//*[translate(local-name(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz') = 'nodename']");

        while (iterator.MoveNext())
        {
            Console.WriteLine(iterator.Current.OuterXml);
        }
    }
}