thread leak

[Hello-Mango]

Hi, i'm using SocketIoClientDotNet for .Net 4.0 and i have some problems. This example code make thread leak. the thread is more and more,and follow the source code,I find the method run in Heartbeat_net35.cs is not release thread,and now I Comment this method,it is work well,but i don't know this will have any problem,my code is here
`public void Connect()
{
socket = IO.Socket(GlobalStatic.PRINTCONFIG.HeartHOST.host, new IO.Options()
{
Reconnection = true,
ReconnectionDelay = 1000,
Transports = new List() { "websocket" },
Path = GlobalStatic.PRINTCONFIG.HeartHOST.path
});

        socket.On(Socket.EVENT_CONNECT, () =>
        {

            JObject jObject = JObject.Parse(Newtonsoft.Json.JsonConvert.SerializeObject(new
            {
                companyId = GlobalStatic.COMPANY.COMPANY_ID,
                token = GlobalStatic.TOKEN,
                hostId = GlobalStatic.HOST_ID,
                hostName = GlobalStatic.HOST_NAME,
                printerNames = GlobalStatic.HOSTINFO.PrinterName,
                source = "assistant",
                userId = GlobalStatic.UserDomain.user.USER_ID
            }));
            socket.Emit("authentication", jObject);
            Debug.WriteLine("authentication");

            socket.On(Socket.EVENT_DISCONNECT, (data) =>
            {
                Debug.WriteLine("heart disconnect" + data);
                flag = false;
                OnConnectionStatus?.Invoke(flag);
                socket.Disconnect();
            });
            socket.On("authenticated", (obj) =>
            {
                flag = true;
                OnConnectionStatus?.Invoke(flag);
                Debug.WriteLine("success：" + obj);
            });
            socket.On("unauthorized", (obj) =>
            {
                Debug.WriteLine("fail" + obj);
                socket.Disconnect();
            });

            socket.On("logOut", (obj) =>
            {
                OnLogOut?.Invoke();
            });
        });
    }

`