public static Inventory GetData() { var inventory = new Inventory(); inventory.AddArticle(1, new Article { Name = "Computer", Price = 500 }); inventory.AddArticle(5, new Article { Name = "Phone", Price = 200 }); inventory.AddArticle(10, new Article { Name = "Desk", Price = 1000 }); inventory.AddArticle(11, new Article { Name = "Car", Price = 15000 }); inventory.AddArticle(12, new Article { Name = "Chair", Price = 400 }); return(inventory); }