//引入命名空间
using System;
using System.Xml;
using System.Xml.Schema;
using System.IO;

public class Sample 
{
  public static void Main() {

    // Create the XmlSchemaSet class.
    XmlSchemaSet sc = new XmlSchemaSet();

    // Add the schema to the collection.
    sc.Add("urn:bookstore-schema", "books.xsd");

    // Set the validation settings.
    XmlReaderSettings settings = new XmlReaderSettings();
    settings.ValidationType = ValidationType.Schema;
    settings.Schemas = sc;
    settings.ValidationEventHandler += ValidationCallBack;
 
    // Create the XmlReader object.
    XmlReader reader = XmlReader.Create("booksSchemaFail.xml", settings);

    // Parse the file. 
    while (reader.Read());
  }

  // Display any validation errors.
  private static void ValidationCallBack(object sender, ValidationEventArgs e) {
    Console.WriteLine($"Validation Error:\n   {e.Message}\n");
  }
}