static void Main(string[] args) { var app = new Program() { Items = new List <Item> { new Item { Name = "+5 Dexterity Vest", SellIn = 10, Quality = 20 }, new Item { Name = "Aged Brie", SellIn = 2, Quality = 0 }, new Item { Name = "Elixir of the Mongoose", SellIn = 5, Quality = 7 }, new Item { Name = "Sulfuras, Hand of Ragnaros", SellIn = 0, Quality = 80 }, new Item { Name = "Backstage passes to a TAFKAL80ETC concert", SellIn = 15, Quality = 20 }, new Item { Name = "Conjured Mana Cake", SellIn = 3, Quality = 6 } } }; app.ChangeDay(); }