configuring usb to rs-232 converter

Question

 Dear all,
I had been using serial communication for my device to talk to the PC. But these days, I have decided to replace the serial com with usb and I have bought a serial to usb converter for that. But I don't actually know how to interface that converter with my C# code. Previously I worked with C# code for interfacing with HID class device, but the present device I am using seems not to be configured as HID. I tried with it's product and vendor ID to communicate with it from my previous hid software but failed.

Please provide me some suggestions regarding this. If you have any code samples or link, please share


with Thanks....:)