static void Main() { System.Console.WriteLine("Welcome to Furniture Shop"); Furnitures.Chair chair1 = new Furnitures.Chair(); Furnitures.Chair chair2 = new Furnitures.Chair(); Furnitures.Bed bed1 = new Furnitures.Bed(); System.Console.WriteLine("{0}\tprice{1}\tid={2}", chair2, chair2.price, chair2.GetHashCode()); System.Console.WriteLine("{0}\tprice{1}\tid={2}", chair1, chair1.price, chair1.GetHashCode()); System.Console.WriteLine("{0}\tprice{1}\tid={2}", bed1, bed1.price, bed1.GetHashCode()); Data.LinkedList list = new Data.LinkedList(); Data.Set set = new Data.Set(); list.Add(20); list.Add(30); set.Add(20); set.Add(30); Data.Table table = new Data.Table(); //which table? table.Add(2, 3, 4); //System.Console.WriteLine(table.price); }