Model Class: PersonValidation.cs

using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using SnapObjects.Data;

namespace Appeon.ApiDoc.Models.School
{
    /// <summary>
    /// This model class maps to the dbo.Person table.
    /// 
    /// LastName is required.
    /// FirstName is not allowed to be shorter than 2 characters.
    /// </summary>
    [Table("Person", Schema = "dbo")]
    [UpdateWhereStrategy(UpdateWhereStrategy.KeyColumns)]
    public class PersonValidation
    {
        [Key]
        [Identity]
        public int PersonID { get; set; }

        [Required]
        public string LastName { get; set; }

        [MinLength(2)]
        public string FirstName { get; set; }

        public DateTime? HireDate { get; set; }

        public DateTime? EnrollmentDate { get; set; }

        public string Discriminator { get; set; }

    }
}