new public static void Handle(string data, Connection connection)
        {
            List <Message> messages = MessageService.GetMessagesAdressedTo(connection.ConnectedUser.Name);

            try
            {
                foreach (Message messageToSend in messages)
                {
                    Package.Write(
                        connection.TcpClient.GetStream(),
                        RequestConverter.ComposeMessage(messageToSend));
                }
                //Thread.Sleep(10);
                //Package.Write(
                //    connection.TcpClient.GetStream(),
                //    RequestConverter.ComposeGetAllMessagesResponse());
            }
            catch (Exception ex)
            {
                if (ex is NullReferenceException || ex is InvalidOperationException)
                {
                    Console.WriteLine(ex);
                }
                else
                {
                    throw;
                }
            }
        }
        new public static void Handle(string data, Connection connection)
        {
            Message message = RequestConverter.DecomposeMessage(data);

            message.SendedTime = DateTime.UtcNow;

            try
            {
                MessageService.SaveMessageIfLocalIdUnique(message);
                message = MessageService.GetMessageById(message.Id);

                Package.Write(
                    connection.TcpClient.GetStream(),
                    RequestConverter.ComposeMessageSyncInfo(message.Id, message.SenderLocalId, message.SendedTime));

                Connection receiverConnection = ConnectionController.Connections
                                                .FirstOrDefault(c => c.ConnectedUser.Name == message.Receiver);

                if (!(receiverConnection is null))
                {
                    Package.Write(
                        receiverConnection.TcpClient.GetStream(),
                        RequestConverter.ComposeMessage(message));
                }
            }
            catch (Exception ex)
            {
                if (ex is NullReferenceException || ex is InvalidOperationException)
                {
                    //MessageService.SaveMessage(message);

                    // here i got exception; i must correct it;
                    //else
                    //throw;

                    Console.WriteLine(ex.Message);
                }
            }
        }
 public void SendMessage(LocalMessage message)
 {
     ServerConnectionHandler.RequestsToSend.Add(RequestConverter.ComposeMessage(message.GetMessage()));
 }