Operator Overloading in C#

This blog is useful to understand the concept of Operator Overloading.

Introduction

Polymorphism
Polymorphism is an concept of OOPS. Polymorphism in Latin word which describes 'poly' means many
'morphs' means forms.
We can divide the polymorphism into 2 types.
1. Static polymorphism (complied time)
2. Dynamic polymorphism (run time)

Static polymorphism
In this the binding is taken place in compile time. The different types of static polymorphism
are:-
a) Function Overloading
b) Operator Overloading
c) Constructor Overloading

Dynamic polymorphism
In this the binding that takes place at run-time. The difference types of dynamic polymorphism
are:-
a) Function Overriding
b) Abstract Class

Operator overloading
It is the concept of oops  as we know that in object-oriented concept each and every thing deals with classes and objects. Keyword class contains the definition of two operators  i.e. Assignment operator (=) and Ampersand (&) by default.We can perform the( +, -, *, /) on a string ,integer etc while talking with oops concept (C#) we cant directly perform (=,-,*,/)arithmetic operations between two objects. If we want to train ours class other than two operators than we need to do Operator Overloading .

Example of Operator Overloading

// FIND THE SUM OF TWO COMPLEX NO. BY OPERATOR OVERLOADING
using System;
public class ComplexNum
{
    public int real;
    public int imaginary;
    public ComplexNum(int real, int imaginary)
    {
        this.real = real;
        this.imaginary = imaginary;
    }
     // Syntax of Operator Overloading
  public static ComplexNum operator +(ComplexNum n1, ComplexNum n2)
    {
        return new ComplexNum(n1.real + n2.real, n1.imaginary + n2.imaginary);
    }
    // Override the ToString method to display an complex number in the suitable format:
    public override string ToString()
    {
        return (String.Format("{0} + {1}i", real, imaginary));
    }
    public static void Main()
    {
        ComplexNum cnum1 = new ComplexNum(4, 5);
        ComplexNum cnum2 = new ComplexNum(5, 6);
        // Add two Complex objects (num1 and num2) through the
        ComplexNum addition = cnum1 + cnum2;
        // Print the numbers
        Console.WriteLine("First complex number:  {0}", cnum1);
        Console.WriteLine("Second complex number: {0}", cnum2);
        Console.WriteLine("RESULT :The sum of the two numbers: {0}", addition);
        // Hault the output screen
        Console.Read();
    }
}

Output