从窗体处理类中的自定义事件

尝试处理我创建的事件时遇到问题。我正在尝试使用websockets,当我收到消息时,我想引发一个事件,我的一个表单可以订阅该事件。

以我的形式加载事件。我有:

taskRoutingServer = new Core.WebSocketServerWrapper();
taskRoutingServer.MessageReceivedEvent += 
TaskRoutingServer_MessageReceivedEvent1;

以我的形式,方法如下:

private void TaskRoutingServer_MessageReceivedEvent1(object sender, WebSocketSharp.MessageEventArgs e)
{
    throw new NotImplementedException();
}

我打算处理和使用“e”,它将包含我的表单需要处理的数据。我的WebSocket类如下所示:

public class WebSocketServerWrapper : WebSocketBehavior
{
  private WebSocketServer socketServer;
  public delegate void MessageReceivedEventHandler(object sender, MessageEventArgs e);
  public event MessageReceivedEventHandler MessageReceivedEvent;
  public string creator;

  public WebSocketServerWrapper()
  {
      socketServer = new WebSocketServer("ws://localhost:9001");
      socketServer.AddWebSocketService<WebSocketServerWrapper>("/ws");
  }

  public bool IsListening()
  {
      return socketServer.IsListening;
  }

  public void StartListening()
  {
      socketServer.Start();
  }

  public void StopListening()
  {
      socketServer.Stop();
  }

  protected override void OnMessage(MessageEventArgs e)
  {
      //invoke event
      MessageReceivedEvent?.Invoke(this, e);
  }
}

目前的行为是 OnMessage 开火,但是 MessageReceivedEvent 为空,因此不调用事件。如何正确处理此事件?