ISerialClosedPluginOnSerialClosed 方法
            在会话断开时触发
            
命名空间: TouchSocket.SerialPorts程序集: TouchSocket.SerialPorts (在 TouchSocket.SerialPorts.dll 中) 版本:4.0.0-beta.143+5fcca7a4e70968794985dc3793adc50531308be6
Task OnSerialClosed(
	ISerialPortSession client,
	ClosedEventArgs e
)
Function OnSerialClosed ( 
	client As ISerialPortSession,
	e As ClosedEventArgs
) As Task
abstract OnSerialClosed : 
        client : ISerialPortSession * 
        e : ClosedEventArgs -> Task 
- client  ISerialPortSession
 - 发生断开的串口会话对象
 - e  ClosedEventArgs
 - 断开事件的参数
 
Task一个任务对象,表示异步操作