/// <summary>
    /// 自定义List
    /// </summary>
    /// <typeparam name="T">列表中元素的类型</typeparam>
    class MyList<T> : IEnumerable
    {
        T[] t = new T[0];
        public MyList()
        {
        }
        public MyList(int capacity)
        {
            this.Capacity = capacity;
        }
        int count = 0;
        /// <summary>
        /// MyList<T>实际包含的元素个数
        /// </summary>
        public int Count
        {
            get { return count; }
        }
        /// <summary>
        /// 获取或设置MyList<T>的容量
        /// </summary>
        public int Capacity
        {
            get { return t.Length; }
            set
            {
                if (value < count)
                {
                    throw new Exception("容量小于元素个数");
                }
                else
                {
                    T[] newt = new T[value];
                    for (int i = 0; i < count; i++)
                    {
                        newt[i] = t[i];
                    }
                    t = newt;
                }
            }
        }
        /// <summary>
        /// 获取或设置指定索引处的元素
        /// </summary>
        /// <param name="index">要获得或设置的元素从0开始的索引</param>
        /// <returns></returns>
        public T this[int index]
        {
            get
            {
                if (index >= count)
                {
                    throw new Exception("索引超出范围");
                }
                else
                {
                    return t[index];
                }
            }
            set
            {
                if (index >= count)
                {
                    throw new Exception("索引超出范围");
                }
                else
                {
                    t[index] = value;
                }
            }
        }
        /// <summary>
        /// foreach循环
        /// </summary>
        /// <returns></returns>
        public IEnumerator GetEnumerator()
        {
            for (int i = 0; i < count; i++)
            {
                yield return t[i];
            }
        }
        /// <summary>
        /// 将item对象添加到MyList结尾处
        /// </summary>
        /// <param name="item">item:要添加到MyList结尾处的对象</param>
        public void Add(T item)
        {
            if (t.Length == 0)
            {
                t = new T[4];
                t[0] = item;
                count++;
            }
            else
            {
                if (count < t.Length)
                {
                    t[count] = item;
                    count++;
                }
                else
                {
                    T[] newT = new T[t.Length * 2];
                    for (int i = 0; i < count; i++)
                    {
                        newT[i] = t[i];
                    }
                    newT[count] = item;
                    count++;
                    t = newT;
                }
            }
        }
        /// <summary>
        /// 移除特定对象的第一个匹配项
        /// </summary>
        /// <param name="item">item：要移除的对象</param>
        /// <returns></returns>
        public bool Remove(T item)
        {
            int index = -1;
            for (int i = 0; i < count; i++)
            {
                if (t[i].Equals(item))
                {
                    index = i;
                    break;
                }
            }
            if (index > -1)
            {
                for (int i = index; i < count; i++)
                {
                    t[i] = t[i + 1];
                }
                count--;
                t[count] = default(T);
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 移除特定索引的对象
        /// </summary>
        /// <param name="index">index：从0开始的索引</param>
        public void RemoveAt(int index)
        {
            if (index < count)
            {
                for (int i = index; i < count; i++)
                {
                    t[i] = t[i + 1];
                }
                count--;
            }
            else
            {
                throw new Exception("索引大于集合的总个数");
            }
        }
      
        /// <summary>
        /// 移除特定索引的对象
        /// </summary>
        /// <param name="index">index：从0开始的索引</param>
        /// <param name="count">count:要删除的个数</param>
        public void RemoveRange(int index, int count)
        {
            if (index + count > this.count || index >= this.count)
            {
                throw new Exception("点点点");
            }
            else
            {
                for (int i = index; i < index + count; i++)
                {
                    t[i] = default(T);
                }
                this.count -= count;
            }
        }
        /// <summary>
        /// 在特定的位置插入对象
        /// </summary>
        /// <param name="index">index：从0开始的索引</param>
        /// <param name="item">item:插入的对象</param>
        public void Insert(int index, T item)
        {
            if (index > count)
            {
                throw new Exception("超出索引界限");
            }
            else
            {
                for (int i = count; i > index; i--)
                {
                    t[i] = t[i - 1];
                }
                t[index] = item;
                count++;
            }
        }
        /// <summary>
        /// 返回第一个匹配项的位置
        /// </summary>
        /// <param name="item">item:要匹配的项</param>
        /// <returns></returns>
        public int IndexOf(T item)
        {
            int num = -1;
            for (int i = 0; i < count; i++)
            {
                if (t[i].Equals(item))
                {
                    num = i;
                    break;
                }
            }
            return num;
        }
        /// <summary>
        /// 返回第一个匹配项的位置
        /// </summary>
        /// <param name="item">item:要匹配的项</param>
        /// <param name="index">index:从index开始索引</param>
        /// <returns></returns>
        public int IndexOf(T item, int index)
        {
            int num = -1;
            if (index < count)
            {
                for (int i = index; i < count; i++)
                {
                    if (t[i].Equals(item))
                    {
                        num = i;
                        break;
                    }
                }
            }
            else
            {
                throw new Exception("索引大于MyList<T>元素的总个数");
            }
            return num;
        }
        /// <summary>
        ///  返回第一个匹配项的位置
        /// </summary>
        /// <param name="item">item:要匹配的项</param>
        /// <param name="index">index:从index开始索引</param>
        /// <param name="count">count:从index开始索引查找几个索引</param>
        /// <returns></returns>
        public int IndexOf(T item, int index, int count)
        {
            int num = -1;
            if (index + count > this.count)
            {
                throw new Exception("index+count的和不能大于MyList<T>元素的总个数");
            }
            else
            {
                for (int i = index; i < index + count; i++)
                {
                    if (t[i].Equals(item))
                    {
                        num = i;
                        break;
                    }
                }
            }
            return num;
        }
        /// <summary>
        /// 查找最后一个匹配项的位置
        /// </summary>
        /// <param name="item">item:要匹配的项</param>
        /// <returns></returns>
        public int LastIndexOf(T item)
        {
            int num = -1;
            for (int i = count - 1; i >= 0; i--)
            {
                if (t[i].Equals(item))
                {
                    num = i;
                    break;
                }
            }
            return num;
        }
        /// <summary>
        /// 查找从index索引开始的最后一个匹配项的位置
        /// </summary>
        /// <param name="item">item:要匹配的项</param>
        /// <param name="index">index:从该索引处开始查找</param>
        /// <returns></returns>
        public int LastIndexOf(T item, int index)
        {
            int num = -1;
            if (index < count && index > -1)
            {
                for (int i = index; i >= 0; i--)
                {
                    if (t[i].Equals(item))
                    {
                        num = i;
                        break;
                    }
                }
            }
            else
            {
                throw new Exception("索引值超过MyList<T>集合界限");
            }
            return num;
        }
        /// <summary>
        /// 查找从index索引开始的最后一个匹配项的位置
        /// </summary>
        /// <param name="item">item:要匹配的项</param>
        /// <param name="index">index:从该索引处开始查找</param>
        /// <param name="count">count:查找几个对象</param>
        /// <returns></returns>
        public int LastIndexOf(T item, int index, int count)
        {
            int num = -1;
            if (index < this.count && index - count >= -1 && count >= 0)
            {
                for (int i = index; i >= index - count; i--)
                {
                    if (t[i].Equals(item))
                    {
                        num = i;
                        break;
                    }
                }
            }
            else
            {
                throw new Exception("索引值超过MyList<T>集合界限");
            }
            return num;
        }
        /// <summary>
        /// 反转
        /// </summary>
        public void Reverse()
        {
            T[] newT = new T[count];
            int j = 0;
            for (int i = count - 1; i >= 0; i--)
            {
                newT[j] = t[i];
                j++;
            }
            t = newT;
        }
        /// <summary>
        /// 反转
        /// </summary>
        /// <param name="index">index:从该索引出开始反转</param>
        /// <param name="count">count:要反转对象的个数</param>
        public void Reverse(int index, int count)
        {
            if (index > this.count || index + count > this.count)
            {
                throw new Exception("index或index+count的和超过集合元素的总个数");
            }
            else if (index < 0 || count < 0)
            {
                throw new Exception("不能为负数");
            }
            else
            {
                T[] newT = new T[count];
                int j = 0;
                for (int i = count + index - 1; i >= index; i--)
                {
                    newT[j] = t[i];
                    j++;
                }
                for (int i = 0; i < count; i++)
                {
                    t[index + i] = newT[i];
                }
            }
        }
        /// <summary>
        /// 清空
        /// </summary>
        public void Clear()
        {
            for (int i = count - 1; i >= 0; i--)
            {
                t[i] = default(T);
            }
            count = 0;
        }
        /// <summary>
        /// 是否包含item该对象
        /// </summary>
        /// <param name="item">item:是否包含的对象</param>
        /// <returns></returns>
        public bool Contains(T item)
        {
            bool sign = false;
            foreach (T tt in t)
            {
                if (tt.Equals(item))
                {
                    sign = true;
                    break;
                }
            }
            return sign;
        }
    }