private static void CreateSampleData(ISession session)
        {
            using (var transaction = session.BeginTransaction())
            {
                // create a couple of Stores each with some Products and Employees
                var barginBasin = new Store { Name = "Bargin Basin" };
                var superMart = new Store { Name = "SuperMart" };

                var potatoes = new Product { Name = "Potatoes", Price = 3.60 };
                var fish = new Product { Name = "Fish", Price = 4.49 };
                var milk = new Product { Name = "Milk", Price = 0.79 };
                var bread = new Product { Name = "Bread", Price = 1.29 };
                var cheese = new Product { Name = "Cheese", Price = 2.10 };
                var waffles = new Product { Name = "Waffles", Price = 2.41 };

                var daisy = new Employee { FirstName = "Daisy", LastName = "Harrison" };
                var jack = new Employee { FirstName = "Jack", LastName = "Torrance" };
                var sue = new Employee { FirstName = "Sue", LastName = "Walkters" };
                var bill = new Employee { FirstName = "Bill", LastName = "Taft" };
                var joan = new Employee { FirstName = "Joan", LastName = "Pope" };

                // add products to the stores, there's some crossover in the products in each
                // store, because the store-product relationship is many-to-many
                AddProductsToStore(barginBasin, potatoes, fish, milk, bread, cheese);
                AddProductsToStore(superMart, bread, cheese, waffles);

                // add employees to the stores, this relationship is a one-to-many, so one
                // employee can only work at one store at a time
                AddEmployeesToStore(barginBasin, daisy, jack, sue);
                AddEmployeesToStore(superMart, bill, joan);

                // save both stores, this saves everything else via cascading
                session.SaveOrUpdate(barginBasin);
                session.SaveOrUpdate(superMart);

                transaction.Commit();
            }
        }
 public virtual void AddProduct(Product product)
 {
     product.StoresStockedIn.Add(this);
     Products.Add(product);
 }