Expected expression visual studio warning in javascript and razor

Question

What is visual studio complaining about here?

Code

    PoolsGrid = Ext.extend(SearchableGrid, {
    initComponent: function() {
        var me = this;
        var config = {
            url: @(Url.ParameterlessRelativeTemplate<PoolsController>(x => x.List(null)))
        }
    }
});

More code:

    public static IHtmlString ParameterlessRelativeTemplate<TController>(this UrlHelper url,
                                                                          Expression<Action<TController>> action)
        where TController : Controller
    {
        return RelativeTemplate(url, action, true);
    }

Answer 1

The code looks fine. Ignore the error and run your application ( Ctrl+F5 ). It should work fine. Visual Studio Intellisense in Razor views is far from perfect. Hopefully they will improve it in future versions.