Locked file after transfer

protected override void ExecuteTransfer(IFileInfo fi)
{
  TransferOptions transferOptions = new TransferOptions
  {
    TransferMode = TransferMode.Binary, 
    OverwriteMode = OverwriteMode.Overwrite,
    FilePermissions = null, // This is default
    PreserveTimestamp = false
  };

  string destinationFile = $"{_ts._transferPipe.RemoteFolder}/{fi.Name}";
  _ts._session.PutFiles(@fi.FullName, destinationFile, false, transferOptions).Check();
  // If it was successful - move the file to processed

  // Archive won't throw an exception
  Archive(fi.FullName);
}

private void Archive(string fileFullName)
{

  FileInfo fileInfo = new FileInfo(fileFullName);

  try
  {
    string zipFileName = $"{_ts._transferPipe.ProcessedFolder}\\archive_{DateTime.Now:yyyyMM}.zip";

    using (var zipArchive = ZipFile.Open(zipFileName, ZipArchiveMode.Update))
    {                   
      zipArchive.CreateEntryFromFile(fileInfo.FullName,  fileInfo.Name);          
    }

    if (fileInfo.Exists)
      fileInfo.Delete();

  }
  catch (Exception ex)
  {
    _log.Error($"An error occurred while trying to archive or delete the file {fileFullName}. I am going to attempt to move it.", ex);

    string destFileName = $@"{_ts._transferPipe.ProcessedFolder}\{fileInfo.Name}";
    try
    {
      if (fileInfo.Exists)
        fileInfo.MoveTo(destFileName);
    }
    catch (Exception ex2)
    {
      _log.Error($"Moving the file {fileFullName} to {destFileName} failed as well! I will leave it here!", ex2);
      
    }
    
  }
}