WebSocketClientBaseOnWebSocketClosed 方法
            当 WebSocket 连接关闭时触发的事件处理程序。
            
命名空间: TouchSocket.Http.WebSockets程序集: TouchSocket.Http (在 TouchSocket.Http.dll 中) 版本:4.0.0-beta.143+5fcca7a4e70968794985dc3793adc50531308be6
protected virtual Task OnWebSocketClosed(
	ClosedEventArgs e
)
Protected Overridable Function OnWebSocketClosed ( 
	e As ClosedEventArgs
) As Task
abstract OnWebSocketClosed : 
        e : ClosedEventArgs -> Task 
override OnWebSocketClosed : 
        e : ClosedEventArgs -> Task 
- e  ClosedEventArgs
 - 包含关闭原因和状态代码的事件参数。
 
Task一个 
Task 对象,表示异步操作的完成。