static void Main(string[] args)
{
// 客户找到电脑城老板说要买电脑，这里要装两台电脑
// 创建指挥者和构造者
Director director = new Director();
Builder b1 = new ConcreteBuilder1();
Builder b2 = new ConcreteBuilder2();
// 老板叫员工去组装第一台电脑
director.Construct(b1);
// 组装完，组装人员搬来组装好的电脑
Computer computer1 = b1.GetComputer();
computer1.Show();
// 老板叫员工去组装第二台电脑
director.Construct(b2);
Computer computer2 = b2.GetComputer();
computer2.Show();
Console.Read();
}