Code of Association, Composition and Aggregation

I read many times about Association, Composition and Aggregation. What will the simple code in c# of these three terms? I have understood about t开发者_运维问答he difference of Composition and Aggregation, but in Association, its look like just Composition in my view. I am just beginner of c#, sorry if i wrote here something wrong about these terms.

I think this is a reasonable question. In fact, it's been asked and answered rather well, including code examples, in this StackOverflow thread: Difference between association, aggregation and composition

Good luck!