proxy caching algorithm..

Hi all,
I am responsible of creating an algorithm on the proxy server which caches the
most visited web site,

But the problem is that I'm a web developer not a network one & I've no past experience with network programming,
- I've studied a lot of tutorials that are taking about web services, network programming, protocols, proxy servers, squid server & other..
- I've created a console application which send requests & receive responses ( I mean that the code not a problem actually, the problem is the ALGORITHM)

I may create this algorithm, but It'll take more time & I've only 2 weeks remaining, can any one help me to do that in C#,

OR

give me the preferred the preferred steps to avoid time wasting

Thank u all