>>979
class FrameReceivedEventArgs:EventArgs
{
　　public byte[] Frame{get; private set;}
　　....
}

class CommunicationPort
{
　　public even EventHandler<FrameReceivedEventArgs> FrameReceived;
　　....
}

class FrameDecoder
{
　　public FrameDecoder(CommunicationPort c}
　　{
　　　　c.FrameReceived += CommunicationPort_FrameReceived;
　　}

　　private void CommunicationPort_FrameReceived((object sender, FrameReceivedEventArgs e)
　　{
　　　　....
　　}
　　....
}