New Theme Error. (The name 'PublicWidgetZones' does not exist in the current context)

Hi,
I would like to create a new template based on the default template.
However, after copying, for example, the _Header.cshtml file from \ NOP41_demo \ Views \ Shared to NOP41_demo \ Themes \ NewTheme \ Views, the following error appears:

One or more compilation failures occurred:
D: \ WEBSERVER \ NOP \ NOP41_demo \ Themes \ Toys \ Views \ Shared \ _Header.cshtml (2.64): error CS0103: The name 'PublicWidgetZones' does not exist in the current context
D: \ WEBSERVER \ NOP \ NOP41_demo \ Themes \ Toys \ Views \ Shared \ _Header.cshtml (8.71): error CS0103: The name 'PublicWidgetZones' does not exist in the current context
D: \ WEBSERVER \ NOP \ NOP41_demo \ Themes \ Toys \ Views \ Shared \ _Header.cshtml (15,64): error CS0103: The name 'PublicWidgetZones' does not exist in the current context
D: \ WEBSERVER \ NOP \ NOP41_demo \ Themes \ Toys \ Views \ Shared \ _Header.cshtml (27.64): error CS0103: The name 'PublicWidgetZones' does not exist in the current context

Can you ask for help? I'm a beginner, I'm sorry if that's a stupid question ...

Have you first copy _ViewImports.cshtml ?
https://github.com/nopSolutions/nopCommerce/blob/develop/src/Presentation/Nop.Web/Views/_ViewImports.cshtml

Regards,
Tom

Thank you for the quick reply.
This file was already in the directory. (D:\WEBSERVER\NOP\NOP41_demo\Themes\NewTheme\Views)
I did not copy it again.

I will also say, that files from the "components" directory after copying and renaming the file from default.cshtml to the name of the new template (newTheme.cshtm) do not cause this error. (Without changing the name they cause).

Do you have any idea?

thepeche wrote:
Yes, open _ViewImports.cshtml file, and add @using Nop.Web.Framework.Infrastructure
That will fix issue.

Regards,
Tom

It's work! Than You very much!

I don't understand. I need to be detail interpreted.