public void AddOrder(Order order)
 {
     try
     {
         using (var db = new MMDatabaseEntities())
         {
             db.Database.Connection.Open();
             db.Orders.Add(order);
             db.SaveChanges();
         }
     }
     catch (Exception e)
     {
         Console.WriteLine(e);
         throw;
     }
 }
        public void UpdateOrder(int id, int quantity)
        {
            try
            {
                using (var db = new MMDatabaseEntities())
                {
                    db.Database.Connection.Open();
                    Order order = db.Orders.SingleOrDefault((o) => o.Id == id);

                    if (order != null)
                    {
                        order.Quantity = quantity;
                    }
                    db.SaveChanges();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
                throw;
            }
        }