Aggregation is a directional relation between objects in C#. It is the relationship between objects.
For example, Employee and Address
An Employee is associated with a single Department, whereas a Department can have more than one employee. Let us see an example of Employee and Address −
public class Address {
. . .
}
public class Employee {
private Address addr;
public Employee (Address addr) {
this.addr = addr;
}
. . .
}