with this sample code you can identify the available serial port on the PC, running a ForEach iteration SerialPortNames property vb.net and GetPortNames method c#.





Sample code VB.NET



Private Sub BtnFindSerialPort_Click(sender As System.Object, e As System.EventArgs) Handles BtnFindSerialPort.Click
  For Each ports In My.Computer.Ports.SerialPortNames
   MessageBox.Show("Serial port avialible" & " " & ports)
  Next
End Sub