public static string FtpFilesSecurely(string file, string host, string direction, BackgroundWorker bw)

        {

                            var fileInfo = session.GetFileInfo(file);

                            //CalculateDownload

                            worker1.DoWork += (sender, e) =>

                                e.Result = worker1_DoWork(fileInfo, FTP, bw, file);

                            worker1.RunWorkerAsync();



                            //Download files

                            TransferOperationResult transferResult =

                                session.GetFiles(file, FTP.sourceDirectory, false, transferOptions);



                            // Throw on any error

                            transferResult.Check();



                            // Print results

                            return transferResult.IsSuccess ? "Download Succeeded." : "Download Failed.";

}

public static object worker1_DoWork(RemoteFileInfo fileInfo, CompanyFtpInfo FTP, BackgroundWorker bw, string file)

        {

            const string filePart = ".filepart";

            file = FTP.sourceDirectory + file + filePart;

            while (!File.Exists(file))

            {

                System.Threading.Thread.Sleep(1000);

            }

            CalculateDownload(fileInfo, bw, file);

            return "Calculation Complete.";

        }

private static void CalculateDownload(RemoteFileInfo fileInfo, BackgroundWorker bw, string file)

        {

            long remoteFileSize = fileInfo.Length;

            var localFile = new FileInfo(file);

                long localFileSize = localFile.Length;

                while (localFileSize < remoteFileSize)

                {

                    long progress = localFileSize*100/remoteFileSize;

                    bw.ReportProgress((int) progress);



                    localFile = new FileInfo(file);

                    localFileSize = localFile.Length;

                    

                    //this works because as a file is downloaded it is called filename.ext.filepart

                    //when the file is done downloading it is then called filename.ext so therefore 

                    //the original name doesnt exist anymore.

                    if (!File.Exists(file))

                        break;

                }

        }

FileStream stream = File.OpenRead(filePath);

                byte[] buffer = new byte[2048];

                int contentLen = stream.Read(buffer, 0, buffer.Length);

                int totalReadBytesCount = contentLen;



                Stream reqStream = request.GetRequestStream();

                while (contentLen != 0)

                {

                    reqStream.Write(buffer, 0, buffer.Length);

                    contentLen = stream.Read(buffer, 0, buffer.Length);

                    totalReadBytesCount += contentLen;

                    var progress = totalReadBytesCount * 100.0 / stream.Length;

                    bw.ReportProgress((int)progress);

                }