static void Main()
    {
        Console.WriteLine("Welcome to Furniture Shop");
        Chair chair1 = new Chair();
        Chair chair2 = new Chair();
        Bed   bed1   = new Bed();

        Console.WriteLine("{0}\tprice{1}\tid={2}", chair2, chair2.price, chair2.GetHashCode());
        Console.WriteLine("{0}\tprice{1}\tid={2}", chair1, chair1.price, chair1.GetHashCode());
        Console.WriteLine("{0}\tprice{1}\tid={2}", bed1, bed1.price, bed1.GetHashCode());

        LinkedList list = new LinkedList();
        Set        set  = new Set();

        list.Add(20);
        list.Add(30);
        set.Add(20);
        set.Add(30);

        DTable table1 = new DTable(); //which table?

        table1.Add(2, 3, 4);

        Table table2 = new Table();

        Console.WriteLine(table2.price);

        Search search = new Search();

        Console.WriteLine(search);
    }
    static void Main()
    {
        System.Console.WriteLine("Welcome to Furniture Shop");
        Chair chair1 = new Chair();
        Chair chair2 = new Chair();
        Bed   bed1   = new 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());

        LinkedList list = new LinkedList();
        Set        set  = new Set();

        list.Add(20);
        list.Add(30);
        set.Add(20);
        set.Add(30);
    }