AspNetCore.Docs/aspnetcore/includes/reservedRouting.md

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There are also certain sets of keywords that ASP.NET Core MVC uses internally, which should not be used in ASP.NET Core apps as it can result in unexpected outcomes in certain scenarios.

• controller, action, area, and page are reserved keywords used by MVC's routing system. Using these as part of link generations, model bound parameters, or top level properties can bind the reserved route value.

Consider

// /ListProducts/Index.cshtml
@page "{page:int?}"

@functions {
   public async Task OnGetAsync(int page)
   {
        ...
    }

The parameter page on the page handler is not bound correctly since page is a reserved keyword.

• The following keywords are reserved in the context of a Razor view or a Razor Page:
  • page
  • using
  • namespace
  • inject
  • section
  • inherits
  • model
  • addTagHelper
  • removeTagHelper

These keywords should not be used for link generations, model bound parameters, or top level properties.