กรองและฉายข้อมูลสินค้า

using System;
using System.Linq;
record Product(string Name, decimal Price);
class Program
{
    static void Main()
    {
        var products = new[] { new Product("Book", 30), new Product("Pen", 5), new Product("Bag", 45) };
        var names = products.Where(p => p.Price >= 20).OrderBy(p => p.Price).Select(p => p.Name);
        Console.WriteLine(string.Join(", ", names));
    }
}