Visual Studio 2013 - does not recognize asp tag in website project? ...

Hello,
I inherited a web site that uses user controls to set the pages beginning and end tags in all *.aspx pages.
Below is the typical structe of an .aspx page:
<!DOCTYPE html>
<%@ Page Language="VB" WarningLevel="1" Explicit="true" Strict="true" %>
<%@ Register TagPrefix="pt" TagName="page_beg" src="/inc/pt_page_beg_1.ascx" %>
<%@ Register TagPrefix="pt" TagName="page_end" src="/inc/pt_page_end_1.ascx" %>
<pt:page_beg id="page_beg" title="Welcome" runat="server" />
<div>
Other markup for main body goes here
<asp:Literal id="lit_1" text="Some Text" runat="server"/>
</div>
<pt:page_end runat="server" />
The user control "page_beg" outputs an <html lang="xx"> tag where xx is a selected language / culture, along with
the head, title and body tags in addition to other tags depending on various properties set in the control.
The user control "page_end" simply writes out the footer of the page along with the body end and html end tags.
Now, when I load any .aspx page in Visual Studio, all of the <asp tags are underlined and when I hover the popup text displayed is:
"Unrecognized tag prefix or device filter 'asp'."
If I enter a body tag near the top of the page the error disappears (but obviously, I cannot leave a stray body tag in the page).
My question is how do I get Visual Studio to recognize the asp tags in this type of scenario?

I'd try them over here.
VS Web Deployment Projects forum on Microsoft ASP.Net
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

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