private void AddTestDataForInMemory()
        {
            var productsContext = new ProductsContext();

            productsContext.AddRangeAsync(
                new[]
            {
                new Product {
                    Name = "Tomato Soup", Category = "Groceries", Price = 1
                },
                new Product {
                    Name = "Yo-yo", Category = "Toys", Price = 3.75M
                },
                new Product {
                    Name = "Hammer", Category = "Hardware", Price = 16.99M
                }
            });

            productsContext.SaveChangesAsync();
        }