Property และการห่อหุ้ม

using System;

class Product
{
    private decimal _price;
    public decimal Price
    {
        get => _price;
        set => _price = value >= 0 ? value : throw new ArgumentOutOfRangeException();
    }
}

class Program
{
    static void Main()
    {
        var product = new Product { Price = 19.95m };
        Console.WriteLine(product.Price);
    }
}