Can't use Microsoft.Web.Helpers in Nop.Admin 2.2

Hi all,

I am trying to customize a different type of Image upload in the Admin section.  I've installed the NuGet Microsoft.Web.Helpers package, and I am successfully using it in Nop.Web project.  I added the Microsoft.Web.Helpers reference to the Nop.Admin project but for some reason, I just can not get it to show up in any views for my use.

When I add the namespace in any CLASS FILES like controllers or models, it works fine, but it can not find the Microsoft.Web namespace no matter what I do.

Any ideas on why this is happening?

thanks!