Комплексные числа,операция перзагрузки

using System;
 
class Program
{
    public static void Main()
    {
        Complex c1 = new Complex(4.3, 1.2);
        Complex c2 = new Complex(2.1, -5.5);
        Complex c3 = c1 + c2;
        c1.Print();
        c2.Print();
        c3.Print();
        c3 = c3 + 2;
        c3.Print();
        c3 = 1 + c3;
        c3.Print();
    }
}
 
class Complex
{
    private double real;
    private double imaginary;
 
    public Complex()
        : this(0.0, 0.0) { }
    public Complex(double real, double imaginary)
    {
        this.real = real;
        this.imaginary = imaginary;
    }
 
    public void Print()
    {
        Console.WriteLine(string.Format("{0}{1}{2}i", real, (imaginary > 0 ? "+" : ""), imaginary));
    }
 
    public static Complex operator +(Complex left, Complex right)
    {
        return new Complex(left.real + right.real, left.imaginary + right.imaginary);
    }
    public static Complex operator +(double left, Complex right)
    {
        return new Complex(left + right.real, right.imaginary);
    }
    public static Complex operator +(Complex left, double right)
    {
        return right + left;
    }
}