通过 TcpClient 接收的 XPS 文件已损坏

我正在尝试用 C# 创建一个"虚拟打印机"应用程序，该应用程序通过网络接收打印作业，解析原始打印数据以获取某些信息，然后将文档保存到数据库中。 以下类的修改版本适用于 postscript 打印作业(它将传入数据保存到有效的 .prn 文件中，就像打印机设置为打印到"FILE："端口一样。 当我尝试捕获.但是，Microsoft XPS 文档编写器中的 XPS 文档无法打开这些文档。 如果扩展名被重命名，有效的XPS文件也应该是有效的ZIP文件，这也不起作用。 当我将同一文档打印到 FILE： 端口，然后打印到我的应用程序，并在 Notepad++ 中比较结果时，数据长度有 5 个字符的差异，但它看起来相同(它不是纯文本，所以很难看，但前几个字符和最后几个字符似乎是相同的(。 以"正常"方式保存的文件工作正常，但由我的代码生成的文件则不然。

更一般地说，我尝试通过TCP端口接收任意数据并将其写入文件。 我的解决方案是"接近"但不起作用。 我不知道XPS使用什么样的编码，但我使用ASCII作为后记，我已经尝试了ASCII和UTF8用于这个XPS版本。

任何帮助将不胜感激！ 这是我代码的相关部分：

class XPSListener
    {
        private TcpListener tcpListener;
        private Thread listenThread;
        private string instanceName = "";
        private string fileShare = (Settings.Default.SharedPath.Substring(Settings.Default.SharedPath.Length - 1) == @"'") ? Settings.Default.SharedPath : Settings.Default.SharedPath + @"'"; // use SharedPath setting value - append backslash if it isn't already there.
        public XPSListener(string initInstanceName, Int32 initPort)
        {
            this.instanceName = initInstanceName;
            this.tcpListener = new TcpListener(IPAddress.Any, initPort);
            this.listenThread = new Thread(new ThreadStart(ListenForClients));
            this.listenThread.Start();
        }
        private void ListenForClients()
        {
            try
            {
                this.tcpListener.Start();
            }
            catch (Exception e)
            {
                MessageBox.Show("Socket Error 1 - " + e.StackTrace);
            }
            while (true)
            {
                //blocks until a client has connected to the server
                TcpClient client = this.tcpListener.AcceptTcpClient();
                //create a thread to handle communication with connected client
                Thread clientThread = new Thread(new ParameterizedThreadStart(AcceptXPSData));
                clientThread.Start(client);
            }
        }
        private void AcceptXPSData(object client)
        {
            TcpClient tcpClient = (TcpClient)client;
            NetworkStream clientStream = tcpClient.GetStream();
            string tempFilePath = fileShare + "XPStemp_" + instanceName + ".oxps";
            byte[] message = new byte[65536];
            int bytesRead;
            string input;
            while (true)
            {
                bytesRead = 0;
                try
                {
                    //blocks until a client sends a message
                    bytesRead = clientStream.Read(message, 0, 65536);
                    Debug.WriteLine("Bytes read: " + bytesRead.ToString());  
                }
                catch
                {
                    //a socket error has occured
                    break;
                }
                if (bytesRead == 0)
                {
                    //the client has disconnected from the server
                    break;
                }
                //message has successfully been received
                if (instanceName != "DontPrint")
                {
                    Debug.WriteLine(instanceName + " Receiving Data");
                    //ASCIIEncoding encoder = new ASCIIEncoding();
                    UTF8Encoding encoder = new UTF8Encoding();
                    using (FileStream fs = new FileStream(tempFilePath, FileMode.Append, FileAccess.Write))
                    {
                        using (StreamWriter sw = new StreamWriter(fs))
                        {
                            input = encoder.GetString(message, 0, bytesRead);
                            sw.Write(input);
                            // first capture this input and write it to an xps file.  This file can be converted to PDF at a later time by Ghostscript
                            // but we will still have access to the temp file for parsing purposes.
                        }
                    }
                }
               
            }
            tcpClient.Close();
            // processXPS();
        }