Add multiply Files at List box

 OpenFileDialog1.Multiselect = True
            OpenFileDialog1.Title = "Attach File"
            OpenFileDialog1.Filter = "All Files|*.*"
            If OpenFileDialog1.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
                For Each fname As String In OpenFileDialog1.FileNames
                    lstattach.Items.Add(fname)
                Next
            End If