Compiler Error CS0116 in app.config

I get this error when I build.

I understand about scope and enclosing brackets, and I have read several posts for this compiler error on a few different forums, but they all show the error in the C# code, not the XML app.config.

I had published the app, installed it, and run it, but it was named "WindowsFormsApplication1". I wanted to specify the name as something more specific, so I changed the Product Name under Project | Properties, and that's all I changed.

Now I get this error.

I've changed everything back, but I still get the error.

Compiler Error CS0116 (C#)

That very page was one of the several I had already researched, as I mentioned, but it talks about the problem being in the C# code. My error message directs me to the app.config, which is XML.

I was hoping someone had seen it in this context before.

Thanks for the note.

I have no idea what I'm talking about, but you may want to look at this link (which you've probably already seen anyway ...):
App.Config

I do not know what happened with my code. I probably inadvertently deleted one half of a pair of braces '[]' or parens '()' without realizing it, snooping around in the code just to look. A missing brace is what the MS site says probably causes this error, but the compiler should not point me to the XML file.

I deleted the project and recreated it, clearly not an option if this happens in a large project with many forms and classes.

Thanks for your efforts.