ORATOR OVERLOADING IN C#

Write a program to add two complex number by overloading + operator.

using System;
public class Complex
{
    public int real;
    public int imaginary;

    public Complex(int real, int imaginary)
    {
        this.real = real;
        this.imaginary = imaginary;
    }

    public static Complex operator +(Complex c1, Complex c2)
    {
        return new Complex(c1.real + c2.real, c1.imaginary + c2.imaginary);
    }

public void show()
{
Console.WriteLine("{0} + {1}i", this.real, this.imaginary);
}
}

class overloadplus
{
    static void Main()
    {
        Complex num1 = new Complex(12, 8);
        Complex num2 = new Complex(21, 4);
        Complex sum = num1 + num2;

        Console.WriteLine("First complex number:");
        num1.show();
        Console.WriteLine("Second complex number:") ;
        num2.show();
        Console.WriteLine("The sum of the two numbers:");
        sum.show();
    }
}



+++++++++++++++OUTPUT+++++++++++++++++++++
First complex number:                                
12 + 8i
Second complex number:
21 + 4i
The sum of the two numbers:
33 + 12i
************************************************