ArrayList for Serializable use

CollectionT.cs

using System;
using System.Collections.Generic;
using System.Collections;

namespace Serializable
{
    [Serializable]
    public class CollectionT<T> : IList, ICollection, IEnumerable<T>
    {
        private ArrayList list;
        public CollectionT()
        {
            list = new ArrayList();
        }
        #region IEnumerable 成員

        public IEnumerator GetEnumerator()
        {
            return this.list.GetEnumerator();
        }

        #endregion

        #region IEnumerable<T> 成員

        IEnumerator<T> IEnumerable<T>.GetEnumerator()
        {
            foreach (T item in list)
                yield return item;
        }

        #endregion

        #region ICollection 成員
        // for Serializable use

        public void CopyTo(Array array, int index)
        {
            this.list.CopyTo(array, index);
        }

        public int Count
        {
            get { return this.list.Count; }
        }

        public bool IsSynchronized
        {
            get { return this.list.IsSynchronized; }
        }

        public object SyncRoot
        {
            get { return this.list.SyncRoot; }
        }

        #endregion

        #region IList 成員

        public int Add(object item)
        {
            return this.list.Add(item);
        }

        public int Add(T item)
        {
            return this.list.Add(item);
        }

        public void Clear()
        {
            this.list.Clear();
        }

        public bool Contains(object item)
        {
            return this.list.Contains(item);
        }

        public int IndexOf(object value)
        {
            return this.list.IndexOf(value);
        }

        public void Insert(int index, object value)
        {
            this.list.Insert(index, value);
        }

        public bool IsFixedSize
        {
            get { return false; }
        }

        public bool IsReadOnly
        {
            get { return false; }
        }

        public void Remove(object value)
        {
            this.list.Remove(value);
        }

        public void Remove(T item)
        {
            this.list.Remove(item);
        }

        public void RemoveAt(int index)
        {
            this.list.RemoveAt(index);
        }

        public object this[int index]
        {
            get { return this.list[index]; }
            set { this.list[index] = value; }
        }

        #endregion
    }
}