Wygląda na to, że pojawia się błąd informujący, że „Produkty nie zawierają konstruktora, który pobiera 0 argumentów

public class Products
{
    string id;
    string name;
    double price;
    int soldCount;
    int stockCount;

    public Products(string id, string name, double price, 
                      int soldCount, int stockCount, double tax)
    {
        this.id = id;
        this.name = name;
        this.price = price;
        this.soldCount = soldCount;
        this.stockCount = stockCount;
    }
}

//I have got some get and set values for the code above 
//but it would have been too long to put in here

public class FoodProducts : Products
{
    public FoodProduct()
    {
        Console.WriteLine("This is food product");
    }

    public void Limit()
    {
        Console.WriteLine("This is an Attribute of a Product");
    }
}