@model Nullable<DateTime>
@{
    IDictionary<string, object> htmlAttributes;
    object objAttributes;
    if (ViewData.TryGetValue("htmlAttributes", out objAttributes))
    {
        htmlAttributes = objAttributes as IDictionary<string, object> ?? HtmlHelper.AnonymousObjectToHtmlAttributes(objAttributes);
    }
    else
    {
        htmlAttributes = new RouteValueDictionary();
    }
    htmlAttributes.Add("type", "text");
    htmlAttributes["class"] += " datefield";
    String format = "{0:d}";
    @Html.TextBox("", Model, format, htmlAttributes)
}