My company has a website built in ASP.NET and targets .NET 3.5. It is too mangled and massive to be converted to .NET 4 in a timely manner. I am tasked with building a ticketing system. I want this ticketing system to be a completely separate application from the main application.
I added a directory to the website called "TicketingSystem", then in IIS I set this folder as an application, using an app pool that targets .net 4.0. I assumed this application would not be affected by the application above it, especially since it uses its own app pool, but it would seem it is being affected somehow. Navigating to this directory with my .net 4 web app in it generates this error:
http://www.chevtek.com/content/error.jpg
I covered the sensitive information like file paths and stuff, but the line that says config file has a path to the parent application's config file, not the config file of the .net 4 app. Is it not possible to nest a .net 4.0 app within a .net 3.5 app?
As requested here is a screenshot of the IIS directory structure.
Web.config inheritance is unfortunately not something you can turn off completely; Specifically, the top section in the web.config that defines which config sections exist in the web.config cannot be ignored/overridden inside a child application.
The solution is documented here(asp.net 4 breaking changes documentation); Essentially you have to move the values that are currently in the top application up into a machine/FrameworkVersion specific config file and then wrap all(or at least, most) of your root web.config in a location tag with inheritence disabled.
