How to Read MST or CSV file using .net, here are some important concept also used like how to get simple file name or full path of a file in vb.net

Here is a very imp code
and runs smoothly for me.....
================================== Code is here =====================

Take a DataGridView use this code as it is...
here label2 is used like a Progress bar for the users
you can type anything in this label to show users

Sub Import()
        Try
                Label2.Show()
            Dim opn As New OpenFileDialog
            opn.InitialDirectory = "c:\"
            opn.Title = "Open a MST/CSV Files"
            opn.Filter = "CSV Files(*.csv)|*.csv|MST Files(*.MST)|*.MST"
            opn.ShowDialog()
            '============= Only file name without Extension===============
            myfile = System.IO.Path.GetFileNameWithoutExtension(opn.FileName)
            '==========================================================

            Mydb = opn.SafeFileName       ' file name with extension
            path = opn.FileName                                                     ' full path
            TextBox2.ForeColor = Color.Black
            TextBox2.BackColor = Color.Yellow
            TextBox2.Text = path
            If TextBox2.Text = "" Then
                MsgBox("Error.............Please Select Any File", CType(MsgBoxStyle.Question + MsgBoxStyle.OkOnly, MsgBoxStyle))
                TextBox2.Focus()
                Return
            End If
                       Label2.Hide()
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub