public CategoryController(CategoryService categoryService)
 {
     this.CategoryService = categoryService;
 }
 public CategoryWidget(CategoryService categoryService)
 {
     this.CategoryService = categoryService;
 }
 public ArticleService(IConfiguration configuration, CategoryService categoryService, ICache cache)
     : base(configuration)
 {
     this.CategoryService = categoryService;
     this.Cache = cache;
 }