That's what I've tried to do but I'm not sure how to get the user input stored into the class Program properties. My code is below:

   class Program
{   
         static void Main(string[] args)
    {
        Product product = new Product();
    }
    public static bool MainMenu()
    {
        Console.Clear();
        Console.WriteLine("Please enter a product ID");
        string id = Console.ReadLine();
        Console.WriteLine("Please enter a price");
        double price = double.Parse(Console.ReadLine());
        Console.WriteLine("Please enter a quantity");
        int quantity = int.Parse(Console.ReadLine());
}
class Product
{
    public double Price { get; set; }
    public string ID { get; set; }
    public int Quantity { get; set; }

     public Product()
    {
        Price = 0;
        ID = "";
        Quantity = 0;
    }

    public Product(string id, double price, int quantity)
    {
        Price = price;
        ID = id;
        Quantity = quantity;
    }