Method Overloading In C#.NET

What is overloading in C#?

The process of creating more than one method in a class with the same name or creating a method in a derived class with the same name as a method in the base class is called "method overloading". It is a compile time polymorphism.

In C#, we have no need to use any keyword while overloading a method either in the same class or in a derived class.

 

While overloading the methods, a rule to follow is that the overloaded methods must differ either in number of arguments they take or the data type of at least one argument.

Program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace functionloadingProgram {
    class class1 {
        public int Add(int x, int y) {
            return x + y;
        }
        public float Add(int x, float y) {
            return x + y;
        }
    }
    class class2: class1 {
        public int Add(int x, int y, int z) {
            return x + y + z;
        }
    }
    class Program {
        static void Main(string[] args) {
            class2 obj = new class2();
            Console.WriteLine(obj.Add(10, 10));
            Console.WriteLine(obj.Add(10, 12.1 f));
            Console.WriteLine(obj.Add(10, 20, 30));
            Console.ReadLine();
        }
    }
}

Output

20

22.1

60

In this example, you can observe that there are 3 methods with the name Add() but with different parameters.