What is the difference between association aggregation and composition in .net

The third requirement from our list Manager has workers who work under him denotes the same type of relationship like association but with a difference that one of them is an owner.

So as per the requirement, the Manager object will own Worker objects. The child Worker objects can not belong to any other object. For instance, a Worker object cannot belong to a SwipeCard object. But… the Worker object can have its own life time which is completely disconnected from the Manager object.

Looking from a different perspective, it means that if the Manager object is deleted, the Worker object does not die. The last two requirements are actually logically one. House can contain multiple rooms there is no independent life of room and any room cannot belongs to two different houses if we delete the house room will automatically delete. Single questions can have multiple options and option cannot belong to multiple questions.

If we delete questions options will be automatically deleted. Dependency It represents a relationship between two or more objects where an object is dependent on another object s for its specification or implementation. This is represented by a dashed arrow. A client is dependent on the service for implementing its functionalities. A client is dependent on the supplier for supplying products.

If the supplier will not supply the products, the client cannot use those products. Please enable Javascript to correctly display the contents on Dot Net Tricks! Our Most Popular Learning Paths. Browse Articles. Home Articles Oops Understanding Association.. Such type of relationship is called UML Aggregation relation. Skip to content. Notations, Example. Report a Bug. Previous Prev.

Next Continue. Home Testing Expand child menu Expand. SAP Expand child menu Expand. Web Expand child menu Expand. Must Learn Expand child menu Expand. Big Data Expand child menu Expand. Live Project Expand child menu Expand. AI Expand child menu Expand. View All. Difference between Composition and Aggregation. Phil Curnow Updated date May 10, Composition As we know, inheritance gives us an 'is-a' relationship.

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