泛型问题，这里为什么不直接返回实体类型，而是返回了泛型类型

悬赏园豆：80 [已解决问题] 解决于 2009-01-05 12:49

Code
 public void BindSelectCategory() {

        Category bll = new Category();
        IList<CategoryInfo> category = bll.GetCategory();

        DropDownListSearch.Items.Add(new ListItem("所有商品","all"));
        for (int i = 0; i < category.Count; i++) {

            DropDownListSearch.Items.Add(new ListItem(category[i].CategoryName, category[i].CategoryId));
        
        }
    
    }