safaribook-pro-aspnet-mvc3/chap3_your_first_mvc_app/PartyInvites/Models/GuestResponse.cs

using System.ComponentModel.DataAnnotations;

namespace PartyInvites.Models
{
    public class GuestResponse
    {
        [Required(ErrorMessage = "Please enter your name")]
        public string Name { get; set; }
        
        [Required(ErrorMessage = "Please enter your email address")]
        [RegularExpression(".+\\@.+\\..+", 
            ErrorMessage = "Please enter a valid email address")]
        public string Email { get; set; }
        
        [Required(ErrorMessage = "Please enter your name")] 
        public string Phone { get; set; }
        
        [Required(ErrorMessage = "Please specify whether you'll attend")]
        public bool? WillAttend { get; set; }
        
    }
}