Set Start URL with project Start Page (Visual Studio)

[Jon Davis]

I know that you can configure setup Visual Studio to open a specific URL
when debugging. But is it possible to set the application root and then use
the project's "Start Page", i.e. replace the tilde in
"~/my/start/page.aspx"?

Perhaps there is an undocumented but known (by others here) variable that
you put in your Start URL such as (literally)
"http://mydevserver/mydevsite/%StartPage%" ?

Thanks,
Jon