Composition and aggregation in c#

An aggregation is a stronger form of association relationship and is represented with a solid diamond at the aggregate end.

When a subclass inherits from a subclass, it typically inherits both the implementation and the interface. This, in turn, means that you’re forced to accept both as constraints on your class. With aggregation, you get to choose either implementation or interface, or both — but you’re not forced into either .6 Kas 2008

In Aggregation, objects can remain in the scope of a system without each other. In a composition relationship, objects cannot remain in the scope of a system without each other .

Aggregation is a term which is used to refer one way relationship between two objects . … In Java, aggregation represents HAS-A relationship, which means when a class contains reference of another class known to have aggregation. The HAS-A relationship is based on usage, rather than inheritance.