IOException
   在 System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   在 System.Threading.EventWaitHandle.Set()
   在 System.IO.Pipes.PipeStream.AsyncPSCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOverlapped)
   在 System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)