Работа с классами

namespace Работа_с_классами
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Player player = new Player("Alex", 2700, 18);

            player.ShowInfo();
        }
    }

    class Player
    {
        string _name;
        private int _mmr;
        private int _age;

        public Player(string name, int mmr, int age)
        {
            _age = age;
            _name = name;
            _mmr = mmr;
        }

        public void ShowInfo()
        {
            Console.WriteLine($"Имя: {_name} | mmr: {_mmr} | возраст: {_age}") ;
        }
    }
}