How to Update COM1 port default settings(baud rate,parity) C#

Question

I am using Windows XP Professional edition.

As my project requirement i want to update COM1 port default settings to my customized settings.

My Computer -> Manage -> Device Manager -> Ports -> Communications Port -> Port Settings ->

default settings are,

1. Baud Rate === 9600
2. databits === 8
3. parity == none
4. stop bit == 1

I want to change the above settings to

1. Baud Rate === 2400
2. databits === 7
3. parity == even
4. stop bit == 2

(what ever i am changing here in code should reflect in device manger ->port settings

Thanks in advance