App_Code folder issues

Question

So I'm having a really weird issue with my App_Code folder on a new website I'm designing.

I have a basic class inside of a namespace in the App_Code folder. Everything works fine in the IDE when I setup the namespace and make an object from the class. It brings up the class summary on hover, and when you click on "go to deffinition" it goes to the class file. And it also works fine localy.

However, when I load the site onto my server, I get this error message when I access that page:

Line 10: using System.Web.UI.WebControls;
Line 11: using System.Web.UI.WebControls.WebParts;
Line 12: using xxxx.xxxx

Compiler Error Message: CS0246: The type or namespace name 'xxxxxx' could not be found (are you missing a using directive or an assembly reference?)

I know for a fact that the class file is there. Anyone have any idea of whats going on?

Edits:

John, yes it is a 2.0 site.

Answer 1

The problem that your classes are not compiled, You'll solve this issue simply by going to the properties of any class in the App_Code folder and change it's 'Build Action' property from "Content" to "Compile"

Answer 2

If your application is a Web Application project rather than a Web Site project, the code files should not be in the App_Code folder (stupid design, I know). Create a new folder called code or something and put them in there.

It caused me all sorts of problems when I upgraded a bunch of old .Net web sites to application projects.