Data output to file via C # server

People, please tell me why my data is displayed in a file in one line, and there is no transfer to a new line, besides the space has disappeared .. as it looks now:

0: 28.06.2016 22: 42: 511: 28.06.2016 22: 42: 522: 06.28.2016 22: 42: 533: 06.28.2016 22: 42: 544: 28.06.2016 22:42:55

A should be displayed as:

0: 06/28/2016 10:42:51 PM

1: 06/28/2016 10:42:52 PM

2/28/2016 10:42:53

03/28/2016 10:42:54 PM

04/28/2016 10:42:55 PM

The bottom line is that this data comes from the client to the server, writes it to the variable message..server in a file, then overwrites after a minute ..

class Program { const int port = 8888; static TcpListener listener; static void Main(string[] args) { try { var aTimer = new System.Timers.Timer(); aTimer.Interval = 10000; aTimer.AutoReset = true; aTimer.Start(); listener = new TcpListener(IPAddress.Parse("127.0.0.1"), port); listener.Start(); aTimer.Elapsed += OnTimedEvent; Console.WriteLine("Ожидание подключений..."); while (true) { TcpClient client = listener.AcceptTcpClient(); ClientObject clientObject = new ClientObject(client); // создаем новый поток для обслуживания нового клиента Thread clientThread = new Thread(new ThreadStart(clientObject.Process)); clientThread.Start(); } } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { if (listener != null) listener.Stop(); } } private static void OnTimedEvent(Object source, System.Timers.ElapsedEventArgs e) { // Check file access //delete file's old content var file = new FileInfo("log.txt"); try { //stream = file.Open(FileMode.Open, FileAccess.Read, FileShare.None); string[] lines = File.ReadAllLines(@"log.txt"); StringBuilder newLines = new StringBuilder(); foreach (var line in lines) { var date = Convert.ToDateTime(line.Substring(line.IndexOf(' ') + 1)); var currentTime = DateTime.Now; if(date>=currentTime.AddMinutes(-1)) { newLines.Append(line + "\n"); } } Console.WriteLine("Cleaning..."); using (FileStream fstream = new FileStream("log.txt", FileMode.Create)) { // запись массива байтов в файл byte[] array = Encoding.Default.GetBytes(newLines.ToString()); fstream.Write(array, 0, array.Length); } } catch (IOException) { //the file is unavailable because it is: //still being written to //or being processed by another thread //or does not exist (has already been processed) } } } 

And the class code ClientObject

 public class ClientObject { public TcpClient client; public ClientObject(TcpClient tcpClient) { client = tcpClient; } public void Process() { NetworkStream stream = null; try { stream = client.GetStream(); byte[] data = new byte[64]; // буфер для получаемых данных while (true) { // получаем сообщение StringBuilder builder = new StringBuilder(); int bytes = 0; do { bytes = stream.Read(data, 0, data.Length); builder.Append(Encoding.Unicode.GetString(data, 0, bytes)); } while (stream.DataAvailable); string message = builder.ToString() + "\n"; Console.WriteLine("Записываю в log {0}", message); try { using (FileStream fstream = new FileStream("log.txt", FileMode.Append)) { // преобразуем строку в байты byte[] array = Encoding.Default.GetBytes(message); // запись массива байтов в файл fstream.Write(array, 0, array.Length); //Console.WriteLine("Текст записан в файл"); } } catch(Exception ex) { // ERROR MESSAGE TO CLIENT //message = ex.Message; //data = Encoding.Unicode.GetBytes(message); //stream.Write(data, 0, data.Length); } // отправляем обратно сообщение в верхнем регистре //message = message.Substring(message.IndexOf(':') + 1).Trim().ToUpper(); //data = Encoding.Unicode.GetBytes(message); //stream.Write(data, 0, data.Length); } } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { if (stream != null) stream.Close(); if (client != null) client.Close(); } } }