interview

home / developersection / interviews / what is the overriding and overloading in c# with example?

Ask Question

What is the overriding and overloading in C# with example?

Abhishek Srivasatava 1590 17-Sep-2016
c# c# 
Updated on 17-Sep-2020
Abhishek Srivasatava

Employee

Follow Message
Can you answer this question?
Answer

1 Answers

Abhishek Srivasatava

Abhishek Srivasatava

17-Sep-2016

Overloading: This concept is useful when we need the function / method of the same name but different signature or parameter or type. It is the example of compile time polymorphism. 

Example

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication15
{
    public class
program1
    {
        public int add(int a, int b) 
        {
           
          return a + b;
 
        }
        public int add(int a, int b, int c) 
        {
           
          return a + b + c;
 
        }
 
       }
    }   
    class Program
    {
        static void Main(string[] args)
        {     
      program1 p1 = new program1();
      program1 p1 = new program1();
      int b = p1.add(2, 3);
      int c = p1.add(2, 3,4);
      Console.WriteLine("{0}{1}",b,c);          
      Console.ReadLine();
      Console.ReadLine();
        }
    }
}

Overriding: Concept for the overriding is useful when we need a method / function of the same name, parameter, type and the signature which is defined in base and derived class. The advantage of this is that memory will allocate only for one method/function. It is the example of Dynamic time polymorphism. 

It can be done by using the keyword Virtual (before the function name define in base class) and override (before the function name define in derived class)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace ConsoleApplication15
{
    public class program1
    {
        
    public virtual int fun()  
    {  
        return 55; 
    }  
  }  
public class program2 :program1
{  
     
    public override int fun()  
    {  
        return 90; 
    } 
    }  
    class Program
    {
        static void Main(string[] args)
        {
                        
            program1 p1 = new program1();
            program2 p2 = new program2();
 
            int  b= p1.fun();
            
            int c = p2.fun();
            Console.WriteLine("{0}\n{1}",b,c);
            Console.ReadLine();
 
        }
    }
}
 
 
advertising
advertising

Liked By

We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy