Untitled

Why don't I get schema information when using an XPathDocument with a validating XmlReader?
using System;

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

namespace XmlSchemaTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var xpathDocument = ReadAndValidateXmlFile(@"c:tempxmltest.xml", @"C:tempxmltest.xsd");

            if (xpathDocument == null)
                Console.WriteLine("Cannot open document.");
            else
            {
                var xpathNavigator = xpathDocument.CreateNavigator();

                var xpathNodeIterator = xpathNavigator.Select("/Data/FloatValue");

                if (!xpathNodeIterator.MoveNext())
                    Console.WriteLine("No matches.");
                else
                {
                    Console.WriteLine("SchemaInfo is " + ((xpathNodeIterator.Current.SchemaInfo == null) ? "null" : "not null"));
                    Console.WriteLine("XmlType is " + ((xpathNodeIterator.Current.XmlType == null) ? "null" : "not null"));
                    Console.WriteLine("TypedValue is " + xpathNodeIterator.Current.TypedValue.GetType().ToString());
                }
            }

            Console.ReadLine();
        }

        private static XPathDocument ReadAndValidateXmlFile(string xmlPath, string xsdPath)
        {
            var xmlReaderSettings = new XmlReaderSettings();

            xmlReaderSettings.ValidationType = ValidationType.Schema;

            xmlReaderSettings.Schemas.Add(targetNamespace: null, schemaUri: xsdPath); // null means use the target namespace referenced by the XML document

            bool anyValidationErrors = false;

            xmlReaderSettings.ValidationEventHandler += new ValidationEventHandler((object sender, ValidationEventArgs args) => anyValidationErrors = true );

            using (var xmlReader = XmlReader.Create(xmlPath, xmlReaderSettings))
            {
                // Note: a document will be created even if there are validation errors,
                // but for our purposes we'll discard 'invalid' documents.

                var xpathDocument = new XPathDocument(xmlReader);

                if (anyValidationErrors)
                    return null;
                else
                    return xpathDocument;
            }
        }
    }
}