SerialPorts.SerialStream

int nativeEvents = myWaitCommCallback.EndInvoke(ar); <------------ This is throwing an exception

System.IO.IOException was unhandled
  Message=The handle is invalid.

  Source=mscorlib
  StackTrace:
    Server stack trace: 
       at SerialPorts.Resources.WinIOError(Int32 errorCode, String str)
       at SerialPorts.Resources.WinIOError()
       at SerialPorts.SerialStream.WaitForCommEvent()
       at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
       at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
       at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink)
    Exception rethrown at [0]: 
       at System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase)
       at System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData)
       at SerialPorts.WaitEventCallback.EndInvoke(IAsyncResult result)
       at SerialPorts.SerialStream.EndWaitForCommEvent(IAsyncResult ar)
       at System.Runtime.Remoting.Messaging.AsyncResult.SyncProcessMessage(IMessage msg)
       at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink)
       at System.Runtime.Remoting.Proxies.AgileAsyncWorkerItem.DoAsyncCall()
       at System.Runtime.Remoting.Proxies.AgileAsyncWorkerItem.ThreadPoolCallBack(Object o)
       at System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
       at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)
  InnerException: