using System;

using System.IO;

using System.Xml;

using System.Xml.Linq;

using System.Xml.Schema;

​

public class Program

{

    public static void Main(string[] args)

    {

        const string schema =

            @"<xs:schema attributeFormDefault='unqualified' elementFormDefault='qualified' xmlns:xs='http://www.w3.org/2001/XMLSchema'>

  <xs:element name='Questions'>

    <xs:complexType>

      <xs:sequence>

        <xs:element name='Question' maxOccurs='unbounded' minOccurs='1'>

          <xs:complexType>

            <xs:sequence>

              <xs:element type='xs:string' name='Content'/>

              <xs:element type='xs:string' name='Answer' maxOccurs='unbounded' minOccurs='2'/>

              <xs:element type='xs:int' name='CorrectIndex'/>

              <xs:element type='xs:int' name='Difficulty'/>

            </xs:sequence>

          </xs:complexType>

        </xs:element>

      </xs:sequence>

    </xs:complexType>

  </xs:element>

</xs:schema>";

​

        const string xml = @"<Questions>

  <Question>

    <Content>This is a question?</Content>

    <Answer>1953</Answer>

    <Answer>1950</Answer>

    <Answer>1952</Answer>

    <Answer>1951</Answer>

    <Answer>1956</Answer>

    <CorrectIndex>1</CorrectIndex>

    <Difficulty>2</Difficulty>

  </Question>

</Questions>";

​

        var schemas = new XmlSchemaSet();

​

        schemas.Add("", XmlReader.Create(new StringReader(schema)));

​

        var doc = XDocument.Parse(xml);

​

        var errors = 0;

        doc.Validate(schemas, (o, e) =>

        {

            Console.WriteLine("{0}", e.Message);

            errors++;

        });

​

        Console.WriteLine("Document has {0} errors", errors);        

    }

}

​