COM message reception - Garbage data

Oh - What do I know - I just have a Bachelor in Computer Science.

In Windows 7, it fails to install natively. So please guide me with useful links into how to do so since COM port is not installed as long as I don't install the Arduino IDE (which is the only way I found to install the serial port - Driver install). The other installation methods (driver only) failed.

Do I use directly the USB port? I'm not using a converter. I'm using the USB port provided by the Arduino UNO board. It is readable by Serial Monitor. But garbage in C# serial port readout.

At the moment, the only way I see to be able to do it is to look at the java source code of serial monitor - Which force me to learn also that "process" application which I don't know yet. It would take a lots of time and I wish I'm not forced to pass through that.

I know I'm missing something - Just want to find out what it is - But by the reply I get, I don't see it happening yet. I checked stuff on the net but it doesn't give me the answer yet. I can't figure out from the answer I got yet.

Just want to be respectful by the way.

So useful links - video - guide are welcome.