C# 为什么发送Apple推送通知和Android使用TcpClient会导致应用程序挂起？

我在网上搜索了一下，找不到解决问题的办法

我有一个针对.NETFramework4.0的项目

我有两种方法。一个用于将通知推送到ios设备，另一个用于将通知推送到android设备

这是我的第一个方法：

public void SendAplePushNotificationMessage(string body, int Participant_ID, int Trainer_ID)
    {
        var componentSetup = new ComponentSetup();
        var odsDevicesToken = componentSetup.getDevicesToken(Participant_ID, Trainer_ID, 1);
        if (odsDevicesToken.Tables[0].Rows.Count > 0)
        {
            foreach (DataRow dr in odsDevicesToken.Tables[0].Rows)
            {
                try
                {
                    var deviceToken = HexStringToByteArray(dr["DeviceToken"].ToString());
                    var memoryStream = new MemoryStream();
                    var writer = new BinaryWriter(memoryStream);
                    writer.Write((byte)0);  //The command
                    writer.Write((byte)0);  //The first byte of the deviceId length (big-endian first byte)
                    writer.Write((byte)32); //The deviceId length (big-endian second byte)
                    writer.Write(deviceToken);
                    writer.Write((byte)0); //First byte of payload length; (big-endian first byte)     
                    var payload = "{\"aps\":{\"alert\":\"" + body + "\",\"badge\":1,\"sound\":\"default\"}}";
                    var b1 = Encoding.UTF8.GetBytes(payload);
                    if (b1.Length > 256)
                    {
                        body = body.Substring(0, 106) + "...";
                        payload = "{\"aps\":{\"alert\":\"" + body + "\",\"badge\":1,\"sound\":\"default\"}}";
                        b1 = Encoding.UTF8.GetBytes(payload);
                    }
                    writer.Write((byte)b1.Length);
                    writer.Write(b1);
                    writer.Flush();
                    var array = memoryStream.ToArray();
                    memoryStream.Write(Encoding.ASCII.GetBytes(body), 0, body.Length);
                    var port = Convert.ToInt32(ConfigurationManager.AppSettings["APNPortNo"]);
                    var hostname = ConfigurationManager.AppSettings["APNHostName"];
                    var certificatePath = Server.MapPath("~") + ConfigurationManager.AppSettings["APNCertificatePath"].Replace("/", "\\");
                    Logger.LogInfoMessage("certificatePath: " + certificatePath);
                    var clientCertificate = new X509Certificate2(File.ReadAllBytes(certificatePath), "");
                    var certificatesCollection = new X509Certificate2Collection(clientCertificate);
                    var client = new TcpClient(hostname, port);
                    var sslStream = new SslStream(client.GetStream(), false,
                    new RemoteCertificateValidationCallback(ValidateServerCertificate), null);
                    try
                    {
                        sslStream.AuthenticateAsClient(hostname, certificatesCollection, SslProtocols.Tls, false);
                        sslStream.Write(array);
                        sslStream.Flush();
                        client.Close();
                    }
                    catch (AuthenticationException ex)
                    {
                        client.Close();
                        var setupObj = new ComponentSetup();
                        setupObj.AddErrorLog(ex.Message, CamelRaceContext.UserSettings.User.USER_NAME, null,
                            Participant_ID, dr["DeviceToken"].ToString());
                        if (ex.InnerException != null)
                            Logger.LogErrorMessage(ex.InnerException, ex.InnerException.Message);
                        throw new CamelRaceApplicationException<MobileAdmin_ManageNotifications>(ex.Message, ex);
                    }
                    catch (CamelRaceApplicationException<MobileAdmin_ManageNotifications> ex)
                    {
                        throw new CamelRaceApplicationException<MobileAdmin_ManageNotifications>(ex.Message,ex);
                    }
                    catch (Exception e)
                    {
                        client.Close();
                        var setupObj = new ComponentSetup();
                        setupObj.AddErrorLog(e.Message, CamelRaceContext.UserSettings.User.USER_NAME, null, Participant_ID, dr["DeviceToken"].ToString());
                    }
                }
                catch (CamelRaceApplicationException<MobileAdmin_ManageNotifications> ex)
                {
                    throw new CamelRaceApplicationException<MobileAdmin_ManageNotifications>(ex.Message, ex);
                }
                catch (Exception exMain)
                {
                    var setupObj = new ComponentSetup();
                    setupObj.AddErrorLog(exMain.Message, CamelRaceContext.UserSettings.User.USER_NAME, null, Participant_ID, dr["DeviceToken"].ToString());
                    if (exMain.InnerException != null)
                        Logger.LogErrorMessage(exMain.InnerException, exMain.InnerException.Message);
                }
            }
        }
    }

现在，当设备数为3或4时，此代码工作正常

当这个数字增加时。比如8423

它会导致应用程序挂起

目前我正在点击按钮调用此代码

我想知道使用task类来编写代码会不会让它正常工作

var task1 = Task.Factory.StartNew(() =>SendAplePushNotificationMessage(txtNotification.Text, Participant_ID, Trainer_ID) , TaskCreationOptions.LongRunning);

var task2 = Task.Factory.StartNew(() => SendGCMPushNotificationMessage(txtNotification.Text, Participant_ID, Trainer_ID), TaskCreationOptions.LongRunning);
                        Task.WaitAll(task1, task2);

我知道你们中的一些人会建议使用pushsharp

我正在考虑这样做

然而，推动尖锐的目标4.5

我的项目目标是4.0

升级不是一个选项

我的解决方案有效吗

如果没有，我该如何解决我的问题呢

---

谢谢

伙计们，我需要帮助。背景线程不起作用。伙计们，我需要帮助。背景线程不工作。

var task1 = Task.Factory.StartNew(() =>SendAplePushNotificationMessage(txtNotification.Text, Participant_ID, Trainer_ID) , TaskCreationOptions.LongRunning);

var task2 = Task.Factory.StartNew(() => SendGCMPushNotificationMessage(txtNotification.Text, Participant_ID, Trainer_ID), TaskCreationOptions.LongRunning);
                        Task.WaitAll(task1, task2);