[再读书]索引器

    class Person
    {
        private string strName = string.Empty;

        public Person(string strName)
        {
            this.strName = strName;
        }

        public string StrName
        {
            get
            {
                return strName;
            }
        }
    }

    /// <summary>
    /// Person容器
    /// </summary>
    class foo
    {
        List<Person> persons = new List<Person>();

        /// <summary>
        /// 索引器
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        public Person this[int index]
        {
            get
            {
                return persons[index];
            }
            set
            {
                persons[index] = value;
            }
        }

        /// <summary>
        /// 重载索引器
        /// </summary>
        /// <param name="strName"></param>
        /// <returns></returns>
        public Person this[string strName]
        {
            get
            {
                foreach (Person pr in persons)
                {
                    if (pr.StrName == strName)
                    {
                        return pr;
                    }
                }
                return persons[0];
            }
        }

        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="person">Person实例</param>
        public void AddPerson(Person person)
        {
            persons.Add(person);
        }

        /// <summary>
        /// 移除
        /// </summary>
        /// <param name="person"></param>
        public void RemovePerson(Person person)
        {
            persons.Remove(person);
        }

        /// <summary>
        /// 计数器
        /// </summary>
        public int Count
        {
            get
            {
                return persons.Count;
            }
        }
    }