手痒痒,也来个c# 2.0 object pool

看到http://www.cnblogs.com/teddyma/archive/2006/01/11/315158.html写了个object pool,心痒痒的,也跟着写了个.
其实这是我以前用vs2003写的代码,现在修改为c#2.0
不过对一些简单的对象还是建议不要用object pool,用了效果还比不上new.

 class ObjectPool<T>
    {
        PoolItem<T> m_Cur;
        public ObjectPool()
        {
        }
        public T GetNew()
        {
            lock (this)
            {
                if (null == m_Cur)
                {
                    return System.Activator.CreateInstance<T>();
                }
                else
                {
                    T ret = m_Cur.Next.PoolObject;
                    m_Cur = m_Cur.Next;
                    return ret;
                }
            }
        }
        public void Free(T o)
        {
            lock (this)
            {
                if (null == m_Cur)
                {
                    m_Cur = new PoolItem<T>(o);
                }
                else
                {
                    m_Cur.Next = new PoolItem<T>(o);
                }
            }
        }
        class PoolItem<TT>
        {
            public PoolItem(TT o) { PoolObject = o; }
            public TT PoolObject;
            public PoolItem<TT> Next;
        }