C#

private static void WriteArchive(string document, MessageType outboundInfo, string filePath, FtpWebRequest request)
        {
            try
            {
                using (MemoryStream memoryStream = new MemoryStream(document.Length))
                {
                    //configure a buffer for reading data after document is streamed
                    int bufferSize = document.Length;
                    byte[] buffer = new byte[bufferSize];
                    UnicodeEncoding encoding = new UnicodeEncoding();
                    byte[] _document = encoding.GetBytes(document);

                    //stream document and reset memoryStream's internal position pointer
                    memoryStream.Write(_document, 0, _document.Length);
                    memoryStream.Seek(0, SeekOrigin.Begin);
                    request.Method = WebRequestMethods.Ftp.UploadFile;
                    request.UsePassive = true;
                    request.UseBinary = false;
                    request.KeepAlive = false;
                    using (Stream stream = request.GetRequestStream())
                    {
                        //now pointing to the FtpWebRequest's internal stream
                        int content = memoryStream.Read(buffer, 0, bufferSize);
                        while (content != 0)
                        {   //write contents of memoryStream out to FtpWebRequest
                            stream.Write(buffer, 0, content);
                            content = memoryStream.Read(buffer, 0, bufferSize);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

Persone pers1;

Error 1335. The cabinet file 'product.cab' required for this installation is
corrupt and cannot be used..."