Why I can't access child field when use inheritance in C#?

using System;
class MyClass
{  
    public static void Main()
    {
        Student a = new Student();
        Person y = new Gamer();

        Console.WriteLine(a.X);
        Console.WriteLine(y.X); <=== Error here
    }
}

abstract class Person
{
    public abstract void Display();
}

class Student : Person
{
    public int X { get; set; } = 1;
    public override void Display()
    {
        Console.WriteLine("Student");
    }
}

class Gamer : Person
{
    public int X { get; set; } = 1;
    public override void Display()
    {
        Console.WriteLine("Gamer");
    }
}

Hi,
I’ve tried to inherit Student, Gamer class from Person. In the code above, I don’t know why y object cannot access to X – property of Gamer class.

Please, help me to explain. Thanks

>Solution :

just edit this line:

// Person y = new Gamer(); ==> Person does not have a field named X
Gamer y = new Gamer();