public FbArticle(ArticleComponent ac)
     : base(ac)
 {
 }
 public TwitterArticle(ArticleComponent ac)
     : base(ac)
 {
 }
 public Decorator(ArticleComponent articleComponent)
 {
     this.component = articleComponent;
 }
 protected ArticleComponent(ArticleComponent ac)
 {
     this.aComponent = ac;
 }