public PageRouteHandler (string virtualPath, bool checkPhysicalUrlAccess);

virtualPath

String

The virtual path of the physical file of this Route object. The file must be located in the current application. Therefore, the path must begin with a tilde (~).

checkPhysicalUrlAccess

Boolean

If this property is set to false, authorization rules will be applied to the request URL and not to the URL of the physical page. If this property is set to true, authorization rules will be applied to both the request URL and to the URL of the physical page.

参考资料： https://docs.microsoft.com/en-us/dotnet/api/system.web.routing.pageroutehandler.-ctor?view=netframework-4.7.2#System_Web_Routing_PageRouteHandler__ctor_System_String_System_Boolean_