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Csharp Aggregation

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What is C# Aggregation ?

  • In C#, aggregation is a process in which one class defines another class as any entity reference.
  • It is another way to reuse the class.It is a form of association that represents HAS-A relationship.
 C# aggregation

C# aggregation


  • Let's see an example of aggregation where Employee class has the reference of Address class as data member. In such way, it can reuse the members of Address class.
using System;  

public class Address  


    public string addressLine, city, state;  

    public Address(string addressLine, string city, string state)  

     this.addressLine = addressLine;  
 this.city = city;  
 this.state = state;  

   public class Employee  


       public int id;  

       public string name;  

       public Address address;//Employee HAS-A Address  

       public Employee(int id, string name, Address address)  


           this.id = id;  

           this.name = name;  

           this.address = address;  


       public void display()  


           Console.WriteLine(id + " " + name + " " +   

             address.addressLine + " " + address.city + " " + address.state);  



   public class TestAggregation  


        public static void Main(string[] args)  

          Address a1=new Address("G-13, Sec-3","Noida","UP");  
   Employee e1 = new Employee(1,"Sonoo",a1);  
click below button to copy the code. By - c# tutorial - team

C# examples - Output :

Sonoo G-13 Sec-3 Noida UP

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