C#开启WebSocket服务端

nuget安装fleck
using Fleck;
private void StartWS()
{
     //创建webscoket服务端实例
     var server = new WebSocketServer("ws://127.0.0.1:5333");  
     server.Start(socket => {
     socket.OnOpen = () =>
     {
         Console.WriteLine("Open");
     };
     socket.OnClose = () =>
     {
         Console.WriteLine("Close");
     };
     socket.OnMessage = message => {
     //Console.WriteLine(message);
     //textBox1.Text = message;
     if (message == "list")
     {
         socket.Send("发的消息");
         while (true)
         {
             ///
             Thread.Sleep(500);
         }
      }
      };
      });
}