C# 外观模式

using System;
using System.Numerics;
using System.Security.Cryptography.X509Certificates;

namespace ConsoleApp17
{
    class Program
    {
        static void Main(string[] args)
        {
            SubSystem1 subsystem1 = new SubSystem1();
            SubSystem2 subsystem2 = new SubSystem2();

            Facade facade = new Facade(subsystem1, subsystem2);
            Client.CleintCode(facade);

        }
    }


    public class Facade
    {
        protected SubSystem1 _subsystem1;
        protected SubSystem2 _subsystem2;

        public Facade(SubSystem1 system1, SubSystem2 system2)
        {
            this._subsystem1 = system1;
            this._subsystem2 = system2;
        }

        public string Operation()
        {
            string result = "Facade initializeds subsystem:\n";

            result += this._subsystem1.operation1();
            result += this._subsystem2.operation1();

            result += "Facade orders subsystems to perform the action:\n";

            result += this._subsystem1.operetionN();
            result += this._subsystem2.operationZ();

            return result;
        }
    }

    public class SubSystem1
    {
        public string operation1()
        {
            return "SubSystem1:Ready!\n";
        }

        public string operetionN() => "Subsystem1:Go";
   
    }


    public class SubSystem2
    {
        public string operation1() => "SubSystem2:Ready";
        public string operationZ() => "SubSystem2:Fire";
    }


    class Client
    {
        public static void CleintCode(Facade facade)
        {
            Console.WriteLine(facade.Operation());
        
        }
    }

}