CollectionBase的使用

    interface IItem
    {
        object name { get; set; }
        object value { get; set; }
        void getItemByName();
    }

    public class ItemClass : IItem
    {
        #region IItem 成员

        public object name
        {
            get
            {
                throw new NotImplementedException();
            }
            set
            {
                throw new NotImplementedException();
            }
        }

        public object value
        {
            get
            {
                throw new NotImplementedException();
            }
            set
            {
                throw new NotImplementedException();
            }
        }

        public void getItemByName()
        {
            throw new NotImplementedException();
        }

        #endregion
    }
public class ItemCollection : CollectionBase
    {
        public void Add(ItemClass item)
        {}

        public ItemClass this[int i]
        {
            get
            {
                return this.InnerList[i] as ItemClass;
            }
        }

        public ItemClass this[string name]
        {
            get 
            {
                ItemClass reItem = null;
                ArrayList lists = this.InnerList;
                for (int i = 0; i < lists.Count; i++)
                {
                    ItemClass item = lists[i] as ItemClass;
                    if (string.Compare(name, item.name.ToString()) == 0)
                    {
                        reItem = item;
                    }
                }
                return reItem;
            }
        }
    }

这样就可以通过索引或键值来找到对应的item了。