ASP.NET

The model backing the 'MVCDBContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269).

namespace MVCWithWebApiApp.Controllers
{
    public class UserController : Controller
    {
        public ActionResult Index()
        {
            var dbContext = new MVCDBContext();

            List<User> listOfEmployees;
            //var a = oDAL.employees;
            listOfEmployees = dbContext.Users.ToList();
            return Json(listOfEmployees, JsonRequestBehavior.AllowGet);

            //return View();
        }

        //
        // GET: /User/Details/5

        public ActionResult Details(int id)
        {
            return View();
        }

        //
        // GET: /User/Create

        public ActionResult Create()
        {
            return View();
        }

        //
        // POST: /User/Create

        [HttpPost]
        public ActionResult Create(FormCollection collection)
        {
            try
            {
                // TODO: Add insert logic here

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

        //
        // GET: /User/Edit/5

        public ActionResult Edit(int id)
        {
            return View();
        }

        //
        // POST: /User/Edit/5

        [HttpPost]
        public ActionResult Edit(int id, FormCollection collection)
        {
            try
            {
                // TODO: Add update logic here

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

        //
        // GET: /User/Delete/5

        public ActionResult Delete(int id)
        {
            return View();
        }

        //
        // POST: /User/Delete/5

        [HttpPost]
        public ActionResult Delete(int id, FormCollection collection)
        {
            try
            {
                // TODO: Add delete logic here

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
    }
}

namespace MVCWithWebApiApp.Models
{
    public class MVCDBContext : DbContext
    {
        public DbSet<User> Users { get; set; }
    }
}

namespace MVCWithWebApiApp.Models
{
    public class User
    {
        private int _userId;
        public int UserId
        {
            get { return _userId; }
            set { _userId = value; }
        }

        private string _userName;
        public string UserName
        {
            get { return _userName; }
            set { _userName = value; }
        }

    }
}

<add name="MVCDBContext" providerName="System.Data.SqlClient" connectionString="Data Source=KNW-DEL-ABDUL\SQL2008R2;Integrated Security=True;Connect Timeout=15;Encrypt=False;TrustServerCertificate=False"/>

<div id="snapShot" class="collapse">
    <div class="panel-body">
        <div class="row">
            <div class="col-sm-12">
                <div class="form-group">
                    @Html.LabelFor(m => m.Page_HTML, new { @class = "control-label" })
                    <div class="iframe">
                        <iframe id="pageSnapShot" class="iframe" src="@Model.Page_HTML"></iframe>
                    </div>                                                        
                    @Html.ValidationMessageFor(m => m.Page_HTML)
                </div>
            </div>
        </div>
    </div>

<asp:FileUpload ID="flupldDisplayPicture" runat="server" onClick="flupldDisplayPicture_Click"/>