Html.Serialize return NullReferenceException - asp.net-mvc

Question

I have an ViewModel like
namespace ViewModel
{
[Serializable]
public class TestViewModel
{
public int Id { get; set; }
public string Name { get; set; }
public string Description { get; set; }
}
}
Also, I have one action method:
public ActionResult Index()
{
TestViewModel model = new TestViewModel
{
Id = -1,
Name = "Some name",
Description = "Some description"
};
return View(model);
}
And my View something like this:
#using Microsoft.Web.Mvc
#model ViewModel.TestViewModel
#using (Html.BeginForm())
{
Html.Serialize("model", Model, SerializationMode.EncryptedAndSigned);
//....Editor fields
}
In line "Html.Serialize("model", Model, SerializationMode.EncryptedAndSigned);" debugger is stopped and returns exception "object reference not set to an instance of an object" (NullReferenceException). Although, the Model is not null and contains initial values.
I use ASP.Net MVC 3(Razor) and stack trace is below:
in Microsoft.Web.Mvc.SerializationExtensions.SerializeInternal(HtmlHelper htmlHelper,
String name, Object data, SerializationMode mode, Boolean useViewData, MvcSerializer
serializer)
in Microsoft.Web.Mvc.SerializationExtensions.SerializeInternal(HtmlHelper htmlHelper,
String name, Object data, SerializationMode mode, Boolean useViewData)
in Microsoft.Web.Mvc.SerializationExtensions.Serialize(HtmlHelper htmlHelper, String
name, Object data, SerializationMode mode)
in ASP._Page_Views_Wizard_Index_cshtml.Execute()
in c:\Projects\TestProject\Views\Wizard\Index.cshtml:line 15
in System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
in System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
in System.Web.WebPages.StartPage.RunPage()
in System.Web.WebPages.StartPage.ExecutePageHierarchy()
in System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext,
TextWriter writer, WebPageRenderingBase startPage)
in System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer,
Object instance)
in System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter
writer)
in System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
in System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext
controllerContext, ActionResult actionResult)
in System.Web.Mvc.ControllerActionInvoker.
<>c__DisplayClass1c.InvokeActionResultWithFilters>b__19()
in System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter,
ResultExecutingContext preContext, Func`1 continuation)
What's wrong in my code?

Answer 1

You need to use
#Html.Serialize("model", Model, SerializationMode.EncryptedAndSigned)
if you want hidden field with model on form.

Answer 2

The problem was that I had assembly reference to Mvc2Futures ("Microsoft.Web.Mvc.dll"). But when I changed the reference to Mvc3Futures ("Microsoft.Web.Mvc.dll") all work fine.
Thanks a lot.