NSUrl tmpFolder = NSFileManager.DefaultManager.GetTemporaryDirectory();
                                    var tmpFileUrl = tmpFolder.Append(originalFileName, false);
                                    // create a temporary file with the original filename instead of id.jpg (e.g. 3242.jpg -> pump_module.jpg)
                                    NSError copyError;
                                    NSFileManager.DefaultManager.Copy(fileUrl, tmpFileUrl, out copyError);
                                    // if there was no error copying or the file already existed before copy
                                    if (copyError == null || NSFileManager.DefaultManager.FileExists(tmpFileUrl.Path))
                                    {
                                        // the file in the tmp folder has the correct filename
                                        shareFile = tmpFileUrl;
                                    }
                                    else
                                    {
                                        // on error fall back to the former name
                                        shareFile = fileUrl;

                                    }