Programming relations and book recommendations

Question

Hi all, I'm new to the art of C# and programming, and it's a long time ago since I used an OO language (in fact that was in a Smalltalk class at the university). I did a lot of programming in plain C and the last couple of years I programmed extensively in Matlab. I have got a (probably very) simple C#/OO-programming question. I want to implement a one-to-many relation between two different classes. Each class instance must be able to determine which class instance it is related to and make method calls to the related class. What is the way to program this? Further, can someone point me to: - a good book on OO-programming in C#, so not only the language but also info on design patterns programmed using C#. - a good reference book on the .Net Framework. Thanks, Koen.