using System.ComponentModel.DataAnnotations; using System.ComponentModel.DataAnnotations.Schema; namespace ContosoUniversity.Models { public abstract class Person { public int ID { get; set; } [Required] [StringLength(50)] [Display(Name = "Last Name")] public string LastName { get; set; } [Required] [StringLength(50, ErrorMessage = "First name cannot be longer than 50 characters.")] [Column("FirstName")] [Display(Name = "First Name")] public string FirstMidName { get; set; } [Display(Name = "Full Name")] public string FullName { get { return LastName + ", " + FirstMidName; } } } }