chae_sb:
since, i've programmed my arduino to send the character 'e' to the serial port, i'm assuming that when c# reads from the serial port , it will be the same character. i'm making my arduino act as keyboard, emulating the arrow keys and the enter key.
The thing is you need to do something extra on your side, add a breakpoint in the receive event, or test something else. The .net debugger is very powerfull you can edit, evaluate and do almost anything while debugging to solve your issues.