private static IList <File> ReadExtendPropertiesOfFiles(IList <File> files)
 {
     for (int i = 0; i <= files.Count - 1; i++)
     {
         files[i] = FileSystemService.ReadExtendPropertiesOfFile(files[i]);
     }
     return(files);
 }
 public static File GetFileByIDWithExtendProperties(string fileID)
 {
     return(FileSystemService.ReadExtendPropertiesOfFile(FileSystemService.GetFileByID(fileID)));
 }