Using data annotations to validate data in MVC application

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;

[MetadataType(typeof (FooBarMetaData))]
public class FooBar
{
    // Insert FooBar related properties, methods, etc. here

    private sealed class FooBarMetaData
    {
        [DisplayName("First Name")]
        [Required(ErrorMessage = "<b>First Name</b> is required")]
        [StringLength(50, ErrorMessage = "<b>First Name</b> cannot exceed 50 characters")]
        public string FirstName{ get; set; }

        [DisplayName("Last Name")]
        [Required(ErrorMessage = "<b>Last Name</b> is required")]
        [StringLength(50, ErrorMessage = "<b>Last Name</b> cannot exceed 50 characters")]
        public string LastName{ get; set; }

        [DisplayName("Email")]
        [Required(ErrorMessage = "<b>Email</b> is required")]
        [EmailValidator(ErrorMessage = "Invalid email address")]
        public string EmailAddress{ get; set; }

        [DisplayName("Location")]
        [Required(ErrorMessage = "<b>Location</b> is required")]
        [StringLength(50, ErrorMessage = "<b>Location</b> cannot exceed 50 characters")]
        public string Location{ get; set; }
    }
}

public class EmailValidatorAttribute : ValidationAttribute
{
    public override bool IsValid(object value)
    {
        if (value == null)
            return false;

        bool isValidEmail;

        // Insert logic here to validate the email address

        return isValidEmail;
    }
}