OrchardCore 2.0 Registration with Extra fields

[yassinsayed]

i extend Registration page to contain additional fields by creating the below class (that inherit from RegisterViewModel) in Model under custom module and it works fine with OC 1.8 till i update orchardCore 2.0 now i am getting error

An unhandled exception occurred while processing the request.
InvalidOperationException: The model item passed into the ViewDataDictionary is of type 'Castle.Proxies.RegisterViewModelProxy', but this ViewDataDictionary instance requires a model item of type 'OC.DCE.Sign.ViewModels.ceRegisterViewModel'.

How to extend the RegisterUserForm

the Class:

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Localization;
using OrchardCore.Email;
using OrchardCore.Users.ViewModels;

namespace OC.DCE.Sign.ViewModels
{
public class ceRegisterViewModel : RegisterViewModel
{
// To validate registration page
public string FirstName { get; set; }
public string MiddleName { get; set; }
public string LastName { get; set; }
public int Mobile { get; set; }

    public IEnumerable<ValidationResult> CustomSettingValidate(ValidationContext validationContext)
    {
        var emailAddressValidator = validationContext.GetService<IEmailAddressValidator>();
        var S = validationContext.GetService<IStringLocalizer<ceRegisterViewModel>>();

        if (string.IsNullOrWhiteSpace(FirstName))
        {
            yield return new ValidationResult(S["FirstName is required."], new[] { nameof(FirstName) });
        }

        if (string.IsNullOrWhiteSpace(MiddleName))
        {
            yield return new ValidationResult(S["MiddleName is required."], new[] { nameof(MiddleName) });
        }

        if (string.IsNullOrWhiteSpace(LastName))
        {
            yield return new ValidationResult(S["LastName is required."], new[] { nameof(LastName) });
        }

        if (Mobile.ToString() == null)
        {
            yield return new ValidationResult(S["Mobile is required."], new[] { nameof(Mobile) });
        }

    }
}

}

[yassinsayed]

solved it all about drivers