Should I keep a SerialPort connection open?

I am working with serial communication and I'm wondering whether I should keep the SerialPort open or not?

I'm creating a queue of commands and only one will be running at a time. Should I create a SerialPort and open/close it in each command, or should I have another class which holds the port开发者_如何转开发 open and is called from the commands? Or does it really matter?

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Keep it open. No point to have the overhead of opening and closing it.

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In addition to C. Ross's answer, keeping it open will prevent anything else from opening the SerialPort and blocking you later. I would suggest keeping it open.