using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Person peter = new Person() { Gender = "Male", Eyes = "Blue", HairColor = "Brown", Age = 40 };

        Person lucy = new Person() { Gender = "Female", Eyes = "Green", HairColor = "Red", Age = 35 };

        // https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/operator-overloading

        Person child = peter + lucy;

        Console.WriteLine(child);

        var peterBefore = peter.Age;

        peter++;

        Console.WriteLine("Yesterday peter was " + peterBefore + " but today is his " + (peter.Age) + "th birthday");

    }

}

​

public class Person

{

    public string Gender { get; set; }

    public string Eyes { get; set; }

    public string HairColor { get; set; }

    public int Age { get; set; }

    public Person()

    {

    }

​

    public Person(Person c1, Person c2)

    {

        Random rand = new Random();

        List<string> genders = new List<string> { "Male", "Female" };

        Gender = genders[rand.Next(genders.Count)];

        List<string> eyes = new List<string> { c1.Eyes, c2.Eyes };

        Eyes = eyes[rand.Next(eyes.Count)];

        List<string> hairColors = new List<string> { c1.HairColor, c2.HairColor };

        HairColor = hairColors[rand.Next(hairColors.Count)];

    }

​

    public override string ToString()

    {

        return "Gender: " + Gender + ", " + "Eyes: " + Eyes + ", " + "HairColor: " + HairColor;

    }

    public static Person operator +(Person c1, Person c2)

    {

        return new Person(c1, c2);

    }

    public static Person operator ++(Person p)

    {

        p.Age++;

        return p;

    }

}