首先是一个SerialportEx单例类,里面模拟了发送,接收,触发事件等等功能

namespace WindowsFormsApplication1
{
    /// <summary>
    ///  数据到达的委托
    /// </summary>
    /// <param name="text"></param>
    public delegate void DataArrivalHandler(String text);

    /// <summary>
    /// 一个模拟Serialport的单例类
    /// </summary>
    public class SerialportEx
    {
        /// <summary>
        /// 数据到达的事件
        /// </summary>
        public event DataArrivalHandler OnDataArrival;

        /// <summary>
        /// 单例,密封
        /// </summary>
        private SerialportEx()
        {
        }

        /// <summary>
        /// 单例对象
        /// </summary>
        public static readonly SerialportEx Instance = new SerialportEx();

        /// <summary>
        /// 模拟数据到达
        /// </summary>
        /// <param name="text"></param>
        private void DataArrival(String text)
        {
            if (OnDataArrival != null)
            {
                // 触发事件,通知上层
                OnDataArrival(text);
            }
        }

        /// <summary>
        /// 模拟接收数据
        /// </summary>
        public void StartReceive()
        {
            ThreadPool.QueueUserWorkItem(new WaitCallback(Send), null);
        }

        /// <summary>
        /// 模拟模拟,全都是模拟
        /// </summary>
        /// <param name="obj"></param>
        private void Send(Object obj)
        {
            while (true)
            {
                DataArrival(System.DateTime.Now.ToString());
                System.Threading.Thread.Sleep(1000);
            }
        }
    }
}

------解决方案--------------------
使用事件和委托