class Facade
{
SubSystemOne one;
SubSystemTwo two;
SubSystemThree three;
SubSystemFour four;
public Facade()
{
one = new SubSystemOne();
two = new SubSystemTwo();
three = new SubSystemThree();
four = new SubSystemFour();
}
public void MethodA()
{
Console.WriteLine("MethodA組合方法");
one.MethodOne();
two.MethodOne();
}
public void MethodB()
{
Console.WriteLine("MethodB組合方法");
three.MethodOne();
four.MethodOne();
}
}

class SubSystemOne
{
public void MethodOne()
{
Console.WriteLine("子系統方法一");
}
}

class Program
{
static void Main(string[] args)
{
Facade facade = new Facade();
facade.MethodA();
facade.MethodB();
Console.ReadKey();
}
}