ASP.NET MVC 2 - Html.Editor对于可以为空的类型？

using System.Web.Mvc;
using System.Web.UI;

public class MyController : Controller
{
    // ...

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

    [HttpPost]
    public ActionResult MyForm(FormCollection form)
    {
        string html = "<p>My form</p>";
        return View("MyForm", html);
    }
}

using System.Web.Mvc;

public class MyModel
{
    public string Name { get; set; }
}

public class MyController : Controller
{
    // ...

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

    [HttpPost]
    public ActionResult MyForm(MyModel model)
    {
        if (ModelState.IsValid)
        {
            // Save the model to the database
            return RedirectToAction("Index");
        }
        return View("MyForm", model);
    }
}

@model MyModel

@using (Html.BeginForm())
{
    @Html.EditorFor(x => x.Name)
    <button type="submit">Submit</button>
}