namespace Dto; public abstract class ContentLessonDTO { public int Id { get; set; } public string ContentContent { get; set; } public string ContentTitle { get; set; } public int LessonId { get; set; } protected ContentLessonDTO(int id, string contentContent, string contentTitle, int lessonId) { Id = id; ContentContent = contentContent; ContentTitle = contentTitle; LessonId = lessonId; } protected ContentLessonDTO(string contentContent, string contentTitle, int lessonId) { ContentContent = contentContent; ContentTitle = contentTitle; LessonId = lessonId; } protected ContentLessonDTO() { } }