Serial通信的例子(一)

namespace LoMaN.IO {
    using System;
    using System.IO;
    using System.Threading;
    using System.Runtime.InteropServices;
    public class SerialStream : Stream {
        public class SerialAsyncResult : IAsyncResult {
       public SerialAsyncResult(object asyncObject) {
           m_AsyncObject = asyncObject;
           m_WaitHandle = new ManualResetEvent(false);
       }
       internal void Init(object stateObject, AsyncCallback callback, bool bIsRead) {
           m_StateObject = stateObject;
           m_Callback = callback;
           m_bIsRead = bIsRead;
           m_bCompleted = false;
           m_WaitHandle.Reset();
       }
       internal void Reset() {
           m_StateObject = null;
           m_Callback = null;