Detecting when a SerialPort gets disconnected

Question

I have an open SerialPort and receive data through the DataReceived event.

Is there any way to detect if the SerialPort gets d

Answer 1

I solved this problem with a simple backgroundworker. I continuously check/set all current ports into an array and if new ports are different to my ports-array I get the changed ports from these 2 arrays.

Example:

// global variable
List<string> oldPorts = new List<string>();    // contains all connected serial ports

private void bgw_checkSerialPorts_DoWork(object seder, DoWorkEventArgs e)
{
    while (true)
    {
        string[] currentPorts = SerialPort.GetPortNames();    // get all connected serial ports
        string[] diffPorts = currentPorts.Except(oldPorts.ToArray());    // get the differences between currentPorts[] and oldPorts-list

        if (diffPorts.Length > 0)
        {
            // iterate all changed ports
            for (int i = 0; i < diff.Length; i++)
            {
                // check if changed port was in old list
                if (oldPorts.Contains(diff[i]))
                {
                    // port in diff[] was removed
                }
                else
                {
                    // port in diff[] is a new device
                }
            }
        }

        oldPorts = currentPorts.ToList();   // update oldPortlist

        // check every 100ms
        Thread.Sleep(100);
    }
}