public static UpdateFile FromString(string line)
        {
            if (line == null)
                throw new ArgumentNullException("line");

            if (line.StartsWith(" "))
                line = line.TrimStart();

            if (line.EndsWith(" "))
                line = line.TrimEnd();

            string[] segments = line.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
            if (segments == null || segments.Length != 3)
            {
                throw new FormatException("Переданная строка имеет неверный формат");
            }

            long fileSize = long.Parse(segments[2]);
            return new UpdateFile(segments[0], segments[1], fileSize);
        }