Immutable classes C#

Immutable classes C#

extracted from : https://stackoverflow.com/questions/38575646/general-purpose-immutable-classes-in-c-sharp

class Program
    {
        static void Main(string[] args)
        {

            var immutable1 = new A(3, 4, new Batida(name: "juan", lastname: "Doe"));
            var immutable2 = immutable1.With( Batida: new Batida("Roger", "Tan"));

            Console.WriteLine($"data in inmutable 2 ({immutable2.X} and {immutable2.Y}) - Batida {immutable2.Batida.Name}");

            Console.WriteLine($"data in inmutable 1 ({immutable1.X} and {immutable1.Y}) - Batida {immutable1.Batida.Name}");
            Console.ReadLine();
        }
    }


    public class Batida 
    {
        public readonly string Name;
        public readonly string Lastname;
        public Batida(string name, string lastname)
        {
            Name = name;
            Lastname = name;
        }
    }

    public sealed class A
    {
        public readonly int X;
        public readonly int Y;
        public readonly Batida Batida;

        public A(int x, int y, Batida batida)
        {
            X = x;
            Y = y;
            Batida = batida;
        }

        public A With(int? X = null, int? Y = null, Batida Batida = null) =>
            new A(
                X ?? this.X,
                Y ?? this.Y,
                Batida ?? this.Batida
            );
    }