c# – Checking for a COM port

Question:

How to check whether the COM port is connected or not? For example, the user selected COM 3, but during operation this port was disabled. How to correctly check if a COM port is present and is it possible to open it?

At the moment I'm doing this (example):

SerialPort port = new SerialPort("COM 8");
string[] allport = SerialPort.GetPortNames();
bool stat = false;
for (int i = 0; i < allport.Length; i++)
{
    if (allport[i] == port.PortName)
    {
        stat = true;
        break;
    }
}
if (stat)
    port.Open();
else
    Console.WriteLine("{0} отключен.", port.PortName);

But I am sure that this operation can be implemented more competently.

Answer:

As far as I understand, the port can be disabled at any time. Therefore, I would do this: work with the port as usual, and when an IOException I would tell the user about problems when communicating with the port.

You can check through

using System.IO.Ports;

var port = new SerialPort("COM99");
port.Open(); // бросает исключение, если порта нет

or

SerialPort.GetPortNames().Contains("COM99")

(how do you do it).

But catching exceptions still cannot be avoided, since the port may appear or disappear immediately after checking.