نمط واجهة المبنى

namespace DesignPattern.Facade
{
  class SubsystemA
  {
    public string OperationA1()
    {
      return "Subsystem A, Method A1\n";
    }
    public string OperationA2()
    {
      return "Subsystem A, Method A2\n";
    }
  }
 
  class SubsystemB
  {
    public string OperationB1()
    {
      return "Subsystem B, Method B1\n";
    }

    public string OperationB2()
    {
      return "Subsystem B, Method B2\n";
    }
  }

  class SubsystemC
  {
    public string OperationC1()
    {
      return "Subsystem C, Method C1\n";
    }

    public string OperationC2()
    {
      return "Subsystem C, Method C2\n";
    }
  }

  public class Facade
  {
    private readonly SubsystemA a = new SubsystemA();
    private readonly SubsystemB b = new SubsystemB();
    private readonly SubsystemC c = new SubsystemC();
    public void Operation1()
    {
      Console.WriteLine("Operation 1\n" +
        a.OperationA1() +
        b.OperationB1() +
        c.OperationC1());
    }
    public void Operation2()
    {
      Console.WriteLine("Operation 2\n" +
        a.OperationA2() +
        b.OperationB2() +
        c.OperationC2());
    }
  }
}

namespace DesignPattern.Facade.Sample
{ 
  // The 'Subsystem ClassA' class
  class CarModel
  {
    public void SetModel()
    {
      Console.WriteLine(" CarModel - SetModel");
    }
  }

  /// <summary>
  /// The 'Subsystem ClassB' class
  /// </summary>
  class CarEngine
  {
    public void SetEngine()
    {
      Console.WriteLine(" CarEngine - SetEngine");
    }
  }

  // The 'Subsystem ClassC' class
  class CarBody
  {
    public void SetBody()
    {
      Console.WriteLine(" CarBody - SetBody");
    }
  }

  // The 'Subsystem ClassD' class
  class CarAccessories
  {
    public void SetAccessories()
    {
      Console.WriteLine(" CarAccessories - SetAccessories");
    }
  }

  // The 'Facade' class
  public class CarFacade
  {
    private readonly CarAccessories accessories;
    private readonly CarBody body;
    private readonly CarEngine engine;
    private readonly CarModel model;

    public CarFacade()
    {
      accessories = new CarAccessories();
      body = new CarBody();
      engine = new CarEngine();
      model = new CarModel();
    }

    public void CreateCompleteCar()
    {
      Console.WriteLine("******** Creating a Car **********");
      model.SetModel();
      engine.SetEngine();
      body.SetBody();
      accessories.SetAccessories();

      Console.WriteLine("******** Car creation is completed. **********");
    }
  }

  // Facade pattern demo
  class Program
  {
    static void Main(string[] args)
    {
      var facade = new CarFacade();

      facade.CreateCompleteCar();

      Console.ReadKey();
    }
  }
}