XML VB.Net

Imports System
Imports System.Collections
Imports System.IO
Imports System.Xml
Imports System.Xml.Xsl
Imports System.Xml.Schema
Public Class ImportIncludeSample
    Private Shared Sub ValidationCallBack(ByVal sender As Object, ByVal args As ValidationEventArgs)
        If args.Severity = XmlSeverityType.Warning Then
            Console.Write("WARNING: ")
        Else
            If args.Severity = XmlSeverityType.Error Then
                Console.Write("ERROR: ")
            End If
        End If
        Console.WriteLine(args.Message)
    End Sub 'ValidationCallBack
    Public Shared Sub Main()
        Dim schema As New XmlSchema()
        schema.ElementFormDefault = XmlSchemaForm.Qualified
        schema.TargetNamespace = "http://www.w3.org/2001/05/XMLInfoset"
        Dim import As New XmlSchemaImport()
        import.Namespace = "http://www.example.com/IPO"
        schema.Includes.Add(import)
        Dim include As New XmlSchemaInclude()
        include.SchemaLocation = "example.xsd"
        schema.Includes.Add(include)
    End Sub 
End Class