using System; using System.Collections.Generic; using System.ComponentModel.DataAnnotations.Schema; using System.ComponentModel.DataAnnotations; using System.Linq; using System.Text; using System.Threading.Tasks; namespace BookDatabaseImplement.Model { public class Book { public int Id { get; set; } [Required] public string Title { get; set; } = string.Empty; [Required] public string BookType { get; set; } = string.Empty; [Required] [StringLength(200, MinimumLength = 100)] public string Annotation { get; set; } = string.Empty; [InverseProperty("Book")] public List LastReaders { get; set; } = new List(); } }