ASP.NET MVC has this ready in Model , automatically replicable to Views . Example:

ViewModel

public class RegisterBindingModel
{
    [Required]
    [EmailAddress]
    [Display(Name = "Email")]
    public string Email { get; set; }

    [Display(Name = "Confirmar Email")]
    [Compare("Email", ErrorMessage = "E-mail e confirmação não são os mesmos.")]
    public string ConfirmEmail { get; set; }

    [Required]
    [StringLength(100, ErrorMessage = "{0} deve ter pelo menos {2} caracteres de comprimento.", MinimumLength = 6)]
    [DataType(DataType.Password)]
    [Display(Name = "Senha")]
    public string Password { get; set; }

    [DataType(DataType.Password)]
    [Display(Name = "Confirmar senha")]
    [Compare("Password", ErrorMessage = "Senha e confirmação não são as mesmas.")]
    public string ConfirmPassword { get; set; }
}

View

@model SeuSistema.ViewModels.RegisterBindingModel

<h2>@ViewBag.Title.</h2>

@using (Html.BeginForm("Register", "Account", FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
{
    @Html.AntiForgeryToken()
    <h4>Create a new account.</h4>
    <hr />
    @Html.ValidationSummary("", new { @class = "text-danger" })
    <div class="form-group">
        @Html.LabelFor(m => m.Email, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.TextBoxFor(m => m.Email, new { @class = "form-control" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(m => m.ConfirmEmail, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.TextBoxFor(m => m.ConfirmEmail, new { @class = "form-control" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(m => m.Password, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.PasswordFor(m => m.Password, new { @class = "form-control" })
        </div>
    </div>
    <div class="form-group">
        @Html.LabelFor(m => m.ConfirmPassword, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.PasswordFor(m => m.ConfirmPassword, new { @class = "form-control" })
        </div>
    </div>
    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" class="btn btn-default" value="Register" />
        </div>
    </div>
}

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

  

In case of this information, store the confirmed data in the database as well?

No, you never store confirmations. This is why the implementation uses ViewModel , not Model . In Controller , you'll do additional processing when saving the user.