use *.idl file in c#

Mar 20 2013 1:29 PM

I am developing serial port software in windows c#. I have one .idl file which i want to use in my project for communicate with serial port but i don't know how to use idl file in c#.
Can i directly use this file in my software if yes then how because i don't have knowledge about .idl file.
Please help me to solve this.