How to sort the xml in datatable?

Question

Hi

I have xml file and try to load into datagridview, how can I save the xml after I sort it by desc?

Private Sub frmTesting_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

DS.ReadXml(Application.StartupPath & "\user.xml")

        Dim DS As New DataSet

        If DS.Tables(0).Rows.Count = 0 Then

            MsgBox("nothing")

        Else

            Dim i As Integer = 0

            For Each r As DataRow In DS.Tables(0).Rows

                dtgUser.Rows.Insert(i, r("ID"), r("Name"))

                i = i + 1

            Next

        End If

        dtgUser.Sort(dtgUser.Columns("ID"), System.ComponentModel.ListSortDirection.Ascending)

   End Sub

Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click

           

        DS.WriteXml(Application.StartupPath & "\user.xml")

            

    End Sub