public Pizza CreateNewPizza(string crust, string size, List <int> tops)
        {
            Pizza p = new Pizza();

            p.Id    = db.GetPizzaCount() + 1;
            p.Crust = crust;
            p.Size  = size;
            decimal cost = 0;

            if (size == "small")
            {
                cost += 5;
            }
            else if (size == "medium")
            {
                cost += 8;
            }
            else
            {
                cost += 12;
            }
            if (crust == "stuffed")
            {
                cost += 2;
            }
            if (tops.Count > 2)
            {
                cost += (tops.Count - 2);
            }
            p.Cost = cost;
            SavePizza(p);
            db.AddPizzaToppingEntry(p, tops);
            return(p);
        }