管道-过滤器模式

 /// <summary>
    /// 处理消息
    /// </summary>
    public abstract class Context
    {
    }

    /// <summary>
    /// 过滤器
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public interface IFilter<T> where T : Context
    {
        T Handle(T message);
    }

    /// <summary>
    /// 管道
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class PipeBase<T> where T : Context
    {
        protected IList<IFilter<T>> filter = new List<IFilter<T>>();
        public T Message { set; get; }


        public void ProcessHandle()
        {
            foreach (var s in filter)
            {
                s.Handle(Message);
            }
        }

        public void AddFilter( IFilter<T> f )
        {

        }

        public void RemoveFilter(IFilter<T> f)
        {

        }
    }