public void FacadeOperation1()
{
subsystem2.Operation3();
subsystem1.Operation2();
subsystem3.Operation7();
subsystem3.Operation5();
subsystem4.Operation9();
}
public string Operation()
{
var result = "First Operation: \n";
result += _subsystem1.Operation1() + " " + _subsystem2.Operation1() + "\n";
result += "Second Operation: \n";
result += _subsystem1.Operation2() + " " + _subsystem2.Operation2() + "\n";
return(result);
}