I have a bunch of Kenwood TK-2100 VHF radios that are re-programmable via the serial port. I have a DOS-based application that works with the radios, but is only reliable with computers with two (2) ...

I'm not so sure about using the serial port in C#, but with the regular old win32 api you pretty much just open the serial port like any other file specifiying "COM1" as the file name (or whatever the ...