public int Upload(String HostName, String UserName, String Password, String remotePath, String localFilePath)
        {
            int result = 0;
            Session session = null;
            try
            {
                // Setup session options
                SessionOptions sessionOptions = new SessionOptions
                {
                    Protocol = Protocol.Ftp,
                    HostName = HostName,
                    UserName = UserName,
                    Password = Password,
                    Timeout = TimeSpan.FromDays(1),

                };

                using (session = new Session())
                {
                    // Connect
                    session.Open(sessionOptions);

                    // upload files
                    TransferOptions transferOptions = new TransferOptions();
                    transferOptions.TransferMode = TransferMode.Ascii;


                    TransferOperationResult transferResult = null;

                    transferResult = session.PutFiles(localFilePath, remotePath, false, transferOptions);


                   //  Throw on any error
                    transferResult.Check();
                   //  Print results
                    foreach (TransferEventArgs transfer in transferResult.Transfers)
                    {
                        Console.WriteLine("Upload of {0} succeeded", transfer.FileName);
                    }
                    session.GetFiles(@"\remoteserverfolder1folder_backupstest_filestest1.txt", @"d:folder3").Check();
                }

                result = 0;
            }
            catch (Exception e)
            {
                Console.WriteLine("Error: {0}", e);
                result = 1;
            }
            finally
            {
                if (session != null)
                {
                    session.Dispose();
                }
            }
            return result;
        }

project1.Upload("remote host server", "username", "password", @"\remote host serverfolder1folder_backupstest_files", Fileupload1.PostedFile.FileName);