stream read

Jeg har dette:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim myStream As System.IO.Stream
        Dim openFileDialog1 As New OpenFileDialog()
       

        openFileDialog1.InitialDirectory = "c:\"
        openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"
        openFileDialog1.FilterIndex = 2
        openFileDialog1.RestoreDirectory = True

        If openFileDialog1.ShowDialog() = DialogResult.OK Then
            myStream = openFileDialog1.OpenFile()
            If Not (myStream Is Nothing) Then
                TextBox1.Text = openFileDialog1.FileName()

               


               




                myStream.Close()
            End If
        End If



    End Sub


Inden mystream.close() skulle jeg jo gerne kunne lave en instr eller lign... Hvordan gør jeg det?