protected bool Equals(VideoFilePart other)
 {
     return(Number == other.Number && string.Equals(Name, other.Name));
 }
 public VideoFileName(VideoFilePart section, VideoFilePart lecture)
 {
     Section = section ?? throw new ArgumentNullException(nameof(section));
     Lecture = lecture ?? throw new ArgumentNullException(nameof(lecture));
 }