Can I handle cookies in Class Library

Hello Guys,

I am following three tier architecture for my programming. I am creating my business layer in the Class Library. For some reason class library has not got the "web" reference. As I want to handle cookies in my business tier class. I added web reference to that class. But I am a bit worried

Is it okay if I handle cookies in the business layer? Why the Class Libraries does not have reference to web by default??

Thanks,
Dummy

I don't see any problem referencing a web service in a windows app since the windows app is , i assume, will connect over a network .So , I would set up cookies handling in the middle tier(business) too.