Hello, I wrote a controller and a model for the form, when I run the project in the Visual Studio everything works, but after compiling and uploading to the hosting there was an error:" Compilation Error Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0246: The type or namespace name 'UmbracoClean' could not be found (are you missing a using directive or an assembly reference?) Source Error:

Line 34:     
Line 35:     
Line 36:     public class _Page_Views_Partials_forms_ContactForm_cshtml : System.Web.Mvc.WebViewPage<UmbracoClean.Models.ContactFormViewModel> {
Line 37:         
Line 38: #line hidden

Source File: c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\2d8eabfe\b87e4fe8\AppWebcontactform.cshtml.b66a646f.zzqdzlbn.0.cs Line: 36 ".

thanks in advance for any help

here is my sources Controller

using System.Threading.Tasks;
using System.Web;
using System.Web.Mvc;
using Umbraco.Web.Mvc;
using UmbracoClean.Models;

namespace UmbracoClean.Controllers
{
    public class ContactFormSurfaceController : SurfaceController
    {
        // GET: ContactFormSurface
        public ActionResult RenderForm()
        {
            return PartialView("forms/ContactForm", new ContactFormViewModel());

        }
        [HttpPost]
        public async Task<ActionResult> SendForm(ContactFormViewModel contactForm)
        {
            EmailService emailService = new EmailService();
            await emailService.SendEmailAsync(contactForm.Email, contactForm.Fname, contactForm.Message,contactForm.Mname,contactForm.Lname);
            TempData["success"] = true;
            return RedirectToCurrentUmbracoPage();
        }
    }
}

model

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

namespace UmbracoClean.Models
{
    public class ContactFormViewModel
    {
        [Display(Name ="sadasdasdas")]
        public string Fname { get; set; }
        public string Mname { get; set; }
        public string Lname { get; set; }
        public string Email { get; set; }
        public string Message { get; set; }
    }
}

partial View

@model UmbracoClean.Models.ContactFormViewModel
@if (TempData["success"] == null)
{

    <!-- Start Conatct- Area -->
    <section class="contact-area mt-4">
        <div class="container">
            <div class="row justify-content-center text-center">
                <div class="single-contact col-lg-6 col-md-8 p-4">
                    <h1 class="text-white">«Первые три года ребёнок обучается лучше всего.</h1>
                    <h1 class="text-white">
                        Поэтому не ждите!»
                    </h1>
                </div>
            </div>
            @using (Html.BeginUmbracoForm<UmbracoClean.Controllers.ContactFormSurfaceController>("SendForm"))
            {

                <div class="row justify-content-center">
                    <div class="col-lg-5">
                        @Html.EditorFor(model=>model.Fname , new { htmlAttributes = new { @class = "common-input"} })
                        @*<input type="text" name="Fname" class="common-input mt-1" placeholder="Введите ваше имя" />*@


                    </div>
                    <div class="col-lg-5">
                        <input type="text" name="Mname" class="common-input mt-1" placeholder="Введите вашу Фамилию" />


                    </div>


                    <div class="col-lg-5">
                        <input type="email" name="Email" class="common-input mt-1" placeholder="Введите вашу почту" />

                    </div>
                    <div class="col-lg-10">
                        <input type="text" name="Message" class="common-textarea mt-1 mt-4 mb-1" placeholder="Введите ваше сообщение" />

                    </div>
                    <div class="col-lg-10 d-flex justify-content-end">
                        <input type="submit" value="отправить" class="btn btn-primary m-1" />

                    </div>
                    <div class="alert-msg"></div>
                </div>
            }
        </div>
    </section>
    <!-- End Conatct- Area -->
}
else
{
    <p>Отправка успешна</p>
}