PizzaDb.cs

namespace PizzaStore
{
    public record Pizza
    {
        public int? Id { get; set; } 
        public string? Name { get; set; }    
    }
    public class PizzaDb
    {
        private static List<Pizza> _pizzas = new List<Pizza>()
   {
     new Pizza{ Id=1, Name="Montemagno, Pizza shaped like a great mountain" },
     new Pizza{ Id=2, Name="The Galloway, Pizza shaped like a submarine, silent but deadly"},
     new Pizza{ Id=3, Name="The Noring, Pizza shaped like a Viking helmet, where's the mead"}
   };
        public static List<Pizza> GetPizzas()
        {
            return _pizzas;
        }

        public static Pizza? GetPizza(int id)
        {
            return _pizzas.SingleOrDefault(pizza => pizza.Id == id);
        }

        public static Pizza CreatePizza(Pizza pizza)
        {
            _pizzas.Add(pizza);
            return pizza;
        }

        public static Pizza UpdatePizza(Pizza update)
        {
            _pizzas = _pizzas.Select(pizza =>
            {
                if (pizza.Id == update.Id)
                {
                    pizza.Name = update.Name;
                }
                return pizza;
            }).ToList();
            return update;
        }
        //Well structured idea
        public static void RemovePizza(int id)
        {
            _pizzas = _pizzas.FindAll(pizza => pizza.Id != id).ToList();
        }
    }
}