vb.net datagridview中保存到xml

’写：　　　 Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click           Dim ds As New DataSet        ds = DataGridView1.DataSource        ds.WriteXml("test2.xml")    End Sub‘读取    Private Sub Button5_Click(sender As System.Object, e As System.EventArgs) Handles Button5.Click        Dim ds As New DataSet        ds.ReadXml("test.xml")        DataGridView1.DataSource = ds        DataGridView1.DataMember = "node"    End Sub'xml:<?xml version="1.0" standalone="yes"?><xml>  <node id="1">    <name>myname</name>    <place>country</place>  </node></xml>