public FileModel(string filename, string pathToDownload, string size, string serialName, IOneFileDownLoader oneFileDownLoader,DownloadStatus downloadStatus=DownloadStatus.NotStarted)
 {
     this.oneFileDownLoader = oneFileDownLoader;
     PathToDownload = pathToDownload;
     Size = size;
     SerialName = serialName;
     FileName = filename;
     DownloadStatus = downloadStatus;
 }
 public ExUaListFileParser(IOneFileDownLoader oneFileDownLoader)
 {
     this.oneFileDownLoader = oneFileDownLoader;
 }