Send Data from Web Browser to C# Program

Hello friends in Codeguru.

I need your help to find a solution to develop the code for a school project. A C# application is supposed to receive/send information from/to a website by clicking a link/button on a webpage. I can't figure out how to connect the two (Web site and C# application). I can write an application in C# to listen to certain port. To send information from the browser and have the C# app to process it is "the problem". I don't know how to go about it.

ANY type of help is greatly appreciated.