FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create("ftp://test.de/" + test);
           

            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential("test", "test");
            request.UsePassive = true;
            request.UseBinary = true;
            request.KeepAlive = false;

     
            for (int i = 0; i < upload_BMP_ARY.Length; i++)
            {
                upload_BMP_ARY[0].Save(Application.StartupPath + "\\" + test);
                FileStream stream = File.OpenRead(Application.StartupPath + "\\" + test);
                byte[] buffer = new byte[stream.Length];

                stream.Read(buffer, 0, buffer.Length);
                stream.Close();

                //Upload file
                Stream reqStream = request.GetRequestStream();
                reqStream.Write(buffer, 0, buffer.Length);
                reqStream.Close();
            }

            List<string> Dateien = new List<string>();
            Dateien.Add("C:\\PDA.jpg"); Dateien.Add("C:\\Roboter.jpg");
            for (int i = 0; i < Dateien.Count; i++) {
                FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create("ftp://127.0.0.1/"+Path.GetFileName(Dateien[i]));
                request.Method = WebRequestMethods.Ftp.UploadFile;
                request.Credentials = new NetworkCredential("test", "test");
                request.UsePassive = true;
                request.UseBinary = true;
                request.KeepAlive = false;
                Console.Write("Upload Datei '"+Dateien[i]+"'...");
                FileStream stream = null; 
                try { stream = File.OpenRead(Dateien[i]); }
                catch (Exception d) { Console.WriteLine(d.Message); }
                if (stream!=null) {
                    byte[] buffer = new byte[stream.Length];
                    try { 
                        stream.Read(buffer, 0, buffer.Length);
                        //Upload file
                        Stream reqStream = null; 
                        try { reqStream = request.GetRequestStream(); }
                        catch (Exception e) { Console.WriteLine(e.Message); }
                        if (reqStream!=null) {
                            try { reqStream.Write(buffer, 0, buffer.Length); }
                            catch (Exception f) { Console.WriteLine(f.Message); }
                            reqStream.Close();
                        } else { Console.WriteLine(" NULL"); }
                        Console.WriteLine(" OK");                    
                    } catch (Exception d2) { Console.WriteLine(d2.Message); }                  
                }
            }

      private void btUpload_Click(object sender, EventArgs e)
      {
         WebClient uploadclient = new WebClient();

         Uri myconn = null;
         if (tbUploadServer.Text.Contains("ftp://"))
            myconn = new Uri(tbUploadServer.Text + "/" + cbUploadPfad.Text + "/" + lbName.Text);
         else
            myconn = new Uri("ftp://" + tbUploadServer.Text + "/" + cbUploadPfad.Text + "/" + lbName.Text);

         try
         {
            uploadclient.Credentials = new NetworkCredential(tbUploadbenutzer.Text, tbUploadPasswort.Text);
            this.uploadclient.UploadProgressChanged +=new UploadProgressChangedEventHandler(uploadclient_UploadProgressChanged);
            this.uploadclient.UploadFileCompleted += new UploadFileCompletedEventHandler(uploadclient_UploadFileCompleted);
            this.uploadclient.UploadFileAsync(myconn, pfadname);
         }
         catch (Exception ex)
         {
            Messagebox.Show(ex.Message);
         }
}

      void uploadclient_UploadFileCompleted(object sender, UploadFileCompletedEventArgs e)
      {
         if (e.Error == null)
            MessageBox.Show("Upload erfolgreich durchgeführt.");
         else
            MessageBox.Show(e.Error.Message);
      }