Asp.Net Core 2.0 Mvc templates error

Have an Asp.net core 1.1 Mvc app that I converted to 2.0 that includes a custom Templates/ folder.  When I attempt to add a controller w EF actions, I get the following error:

There was an error running the selected code generator:

mvcControllerWithContext.cshtml: Template processing failed: The type or namespace naem 'List<>' could not be found....

I assume there are updated templates for core 2.0 but don't know where to find them??