I try to inhering from ViewPage as shown in this question http://stackoverflow.com/questions/370500/inheriting-from-viewpage

But I get a

Compiler Error Message: CS1061: 'object' does not contain a definition for 'Spot' and no extension method 'Spot' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?)

My viewpage, normally I can do Model.ChildProperty(Spot) when I inherit from ViewPage directly, so I do that here too. But it fails.

 <%@ Page Language="C#" Inherits="Company.Site.ViewPageBase<WebSite.Models.SpotEntity>"  %>

    <h1><%= Html.Encode(Model.Spot.Title) %></h1>

To get it working correctly I have to do like this:

<%@ Page Language="C#" Inherits="Company.Site.ViewPageBase<WebSite.Models.SpotEntity>"  %>

    <h1><%= Html.Encode(((WebSite.Models.SpotEntity)Model).Spot.Title) %></h1>

Here is my classes:

namespace Company.Site
{
public class ViewPageBase<TModel> : Company.Site.ViewPageBase where TModel:class
{
    private ViewDataDictionary<TModel> _viewData;

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public new ViewDataDictionary<TModel> ViewData
    {
        get
        {
            if (_viewData == null)
            {
                SetViewData(new ViewDataDictionary<TModel>());
            }
            return _viewData;
        }
        set
        {
            SetViewData(value);
        }
    }

    protected override void SetViewData(ViewDataDictionary viewData)
    {
        _viewData = new ViewDataDictionary<TModel>(viewData);

        base.SetViewData(_viewData);
    }
}

public class ViewPageBase : System.Web.Mvc.ViewPage
{
}
}

So how do I get it to work without the explicit cast?