데코레이터 패턴 : 실행되지 않음

Question

데코레이터 패턴을 구현하려고하는데 프로그램을 컴파일하려고 할 때 오류가 계속 발생합니다. 나는 이유를 알 수 없다. 나는 그것이 인터페이스가 아닌 것으로 무언가를 가지고 있다는 것을 알고 있지만, 나는 많은 변화를 시도했지만 아무 것도 효과가 없다. 어떤 도움을 주셔서 감사합니다! 당신은 메소드 선언의 기본 클래스를 지정할 필요가 없습니다

#region ShirtsComponent Members 

    string ShirtsComponent.GetBrand() 
    { 
     return string.Format("{0}, {1}", fashion_Base.GetBrand(), _brand); 
    } 

    double ShirtsComponent.GetPrice() 
    { 
     return _price + fashion_Base.GetPrice(); 
    } 
    #endregion 

:

  using System; 
      using System.Collections.Generic; 
      using System.Linq; 
      using System.Text; 
      using System.Threading.Tasks; 

      namespace OODAssignment3_ZackDavidson 
      { 
      class Program 
      { 
      static void Main(string[] args) 
      { 
      //Creates a new Calvin Klein Shirt fordecoration 
      CalvinKlein ckShirt = new CalvinKlein(); 
      Console.WriteLine(Convert.ToString(ckShirt.GetBrand())); 

      //Puts a solid color on the Calvin Klein Shirt 
      solidColorDecorator ckSCD = new solidColorDecorator(ckShirt); 

      //Puts stripes on the Calvin Klein Shirt 
      stripedShirtDecorator ckSSD = new stripedShirtDecorator(ckShirt); 

      //Puts a pocket on the Clavin Klein Shirt 
      pocketShirtDecorator ckPSD = new pocketShirtDecorator(ckShirt); 

      //Creates a new Tommy Hilfiger Shirt 
      TommyHilfiger thShirt = new TommyHilfiger(); 

      //Puts stripes on the Tommy Hilfiger Shirt 
      stripedShirtDecorator thSSD = new stripedShirtDecorator(thShirt); 

      //Puts a pocket on the Tommy Hilfiger Shirt 
      pocketShirtDecorator thPSD = new pocketShirtDecorator(thShirt); 
     }//EndOfMain 
    }//EndOfClassProgram 

    public abstract class ShirtsComponent 
    { 
     public abstract string GetBrand(); 
     public abstract double GetPrice(); 
    } 

    class CalvinKlein : ShirtsComponent 
    { 
     private string ck_Brand = "Calvin Klein"; 
     private double ck_Price = 75.0; 

     public override string GetBrand() 
     { 
      return ck_Brand; 
     } 

     public override double GetPrice() 
     { 
      return ck_Price; 
     } 
    } 

    class TommyHilfiger : ShirtsComponent 
    { 
     private string th_Brand = "Tommy Hilfiger"; 
     private double th_price = 85.0; 

     public override string GetBrand() 
     { 
      return th_Brand; 
     } 

     public override double GetPrice() 
     { 
      return th_price; 
     } 
    } 

    public abstract class Decorator : ShirtsComponent 
    { 
     ShirtsComponent fashion_Base = null; 

     protected string _brand = "Undefined Decorator"; 
     protected double _price = 0.0; 

     protected Decorator(ShirtsComponent fashionBase) 
     { 
      fashion_Base = fashionBase; 
     } 

     #region ShirtsComponent Members 

     string ShirtsComponent.GetBrand() 
     { 
      return string.Format("{0}, {1}", fashion_Base.GetBrand(), _brand); 
     } 

     double ShirtsComponent.GetPrice() 
     { 
      return _price + fashion_Base.GetPrice(); 
     } 
     #endregion 
    } 

    class solidColorDecorator : Decorator 
    { 
     public solidColorDecorator(ShirtsComponent fashionBase) 
      : base(fashionBase) 
     { 
      this._brand = "Solid Color Shirt"; 
      this._price = 25.0; 
     } 
    } 

    class stripedShirtDecorator : Decorator 
    { 
     public stripedShirtDecorator(ShirtsComponent fashionBase) 
      : base(fashionBase) 
     { 
      this._brand = "Striped Shirt"; 
      this._price = 50.0; 
     } 
    } 

    class pocketShirtDecorator : Decorator 
    { 
     public pocketShirtDecorator(ShirtsComponent fashionBase) 
      : base(fashionBase) 
     { 
      this._brand = "Dotted Shirt"; 
      this._price = 90.0; 
     } 
    } 

}//EndOfNamespace 

Answer 1

이 코드는 문제입니다. 올바른 코드는 다음과 같습니다.

#region ShirtsComponent Members 

    public override string GetBrand() 
    { 
     return string.Format("{0}, {1}", fashion_Base.GetBrand(), _brand); 
    } 

    public override double GetPrice() 
    { 
     return _price + fashion_Base.GetPrice(); 
    } 
    #endregion