Regular Expression Validation

See more:

C#

MVC

My Model is:

using System;
using System.ComponentModel.DataAnnotations;

namespace mvc_project1.Models
{
    public class UserDetail
    {
        [Required]
        [RegularExpression(^([a-zA-Z0-9 .&'-]+)$", ErrorMessage = "Invalid First Name")]
        public string FirstName { get; set;}
        [Required]
        [RegularExpression(^([a-zA-Z0-9 .&'-]+)$", ErrorMessage = "Invalid Last Name")]
        public string LastName { get; set; }
        public Guid UserId { get; set; }
    }


}

In Action Controller:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data;
using System.Data.SqlClient;
using mvc_project1.Models;
using Action = mvc_project1.Models.UserDetail;
namespace mvc_project1.Controllers
public ActionResult CreateNew(UserDetail objNewUser)
      {
          if (ModelState.IsValid)
          {
              if (Session["UserList"] == null)
              {
                  Session["UserList"] = GetUserList();
              }
              var userList = (List<UserDetail>)Session["UserList"];

              objNewUser.UserId = Guid.NewGuid();
              userList.Add(objNewUser);
              Session["UserList"] = userList;

              return RedirectToAction("Index");

          }

          return View(objNewUser);

      }

My View Page is this:

@model mvc_project1.Models.UserDetail

@{
    ViewBag.Title = "CreateNew";
}

           
@using (Html.BeginForm())
{
<table>
<tr>
<td>
First Name
</td>
<td>
Last Name
</td>
</tr>
<tbody>
<tr>
<td>

@Html.TextBoxFor(model => model.FirstName)
@Html.ValidationMessageFor(model => model.FirstName)
</td>
<td>
@Html.TextBoxFor(modal=>modal.LastName)
@Html.ValidationMessageFor(model => model.LastName)
</td>
<td>
    <input type="submit" value="Add User" />
</td>
</tr>
</tbody>
</table>
}

Please help me to use regular expression validation.