You Wrote It! Why Can't You Read It? (Xml Serialization)

Public Class Form1
    Dim dt As New DataTable("Stuff")
 
    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        If Not IO.File.Exists("C:\dtable.xml") Then
            dt.Columns.Add("Forename")
            dt.Columns.Add("Surname")
            dt.Rows.Add({"Esmeralda", "Finklepopper"})
            dt.Rows.Add({"Algernon", "Strumple"})
        Else
            Dim sr As New IO.StreamReader("C:\dtable.xml")
            Dim ds As New Xml.Serialization.XmlSerializer(dt.GetType)
            dt = CType(ds.Deserialize(sr), DataTable)
            sr.Close()
        End If
        DataGridView1.DataSource = dt
    End Sub
 
    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Dim sw As New IO.StreamWriter("C:\dtable.xml")
        Dim s As New Xml.Serialization.XmlSerializer(dt.GetType)
        s.Serialize(sw, dt)
        sw.Close()
    End Sub
 
End Class

<?xml version="1.0" encoding="utf-8"?>
<DataTable>
  <xs:schema id="NewDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:MainDataTable="Stuff" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element name="Stuff">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="Forename" type="xs:string" minOccurs="0" />
                <xs:element name="Surname" type="xs:string" minOccurs="0" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:choice>
      </xs:complexType>
    </xs:element>
  </xs:schema>
  <diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
    <DocumentElement>
      <Stuff diffgr:id="Stuff1" msdata:rowOrder="0" diffgr:hasChanges="inserted">
        <Forename>Esmeralda</Forename>
        <Surname>Finklepopper</Surname>
      </Stuff>
      <Stuff diffgr:id="Stuff2" msdata:rowOrder="1" diffgr:hasChanges="inserted">
        <Forename>Algernon</Forename>
        <Surname>Strumple</Surname>
      </Stuff>
    </DocumentElement>
  </diffgr:diffgram>
</DataTable>