I inherited a rather old MVC project that had a Grid package installed, `Grid.MVC`. It is used extensively, and taking it out or replacing it is not an option (client won't pay for it.)

We just built out a new portal section to the site, and in it, we used a new (and better) grid, NonFactors.Grid.Core.MVC5. Much more features and options.

But here's the problem. In all the places where the old grid is used, I now get this run-time error:

> 
> The call is ambiguous between the following methods or properties: 'NonFactors.Mvc.Grid.MvcGridExtensions.Grid(System.Web.Mvc.HtmlHelper, System.Collections.Generic.IEnumerable)' and 'GridMvc.Html.GridExtensions.Grid(System.Web.Mvc.HtmlHelper, System.Collections.Generic.IEnumerable)'
> 
> 
> 

This should be a simple fix. All I need to do is tell the old grids which one they are. But i'm not figuring out the syntax. In the view's, they all have a `@using` which points to the correct (old) version.

```
@using GridMvc.Html
....
@Html.Grid(Model.Leads).Named("userGrid").Selectable(false).Columns(c =>
{
     ....
}

```

A pic might be more helpful:

[![enter image description here](https://i.stack.imgur.com/ckG6e.png)](https://i.stack.imgur.com/ckG6e.png)

I've tried various means of a full path in the view, but the syntax is never right...

```
@GridMvc.Html.GridExtensions.Grid(Model.Leads)....  // Nope
@Html.GridMvc.Html.GridExtensions.Grid(Model.Leads)....  // Nope

```

etc etc etc.

Again, this is probably simple. I'm just not getting it.