Two Modems, two SerialPort objects in C#

m_SerialPort = new SerialPort("COM3", 2400);
m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(this.ReceiveChars);

try
{
    m_SerialPort.Open();
    m_SerialPort.DiscardInBuffer();
    m_SerialPort.DiscardOutBuffer();
}
catch (Exception e)
{
    // die gracefully
}
finally
{
    m_SerialPort.DtrEnable = true;
}