Question : 'System.Configuration.Conf<wbr />igurationE<wbr />xception' occurred in system.dll

I am getting an unhandled exception type 'System.Configuration.ConfigurationException' occurred in system.dll when I attempt to run a very small program I created.  The line of code that is highlighted is shown below.

Dim configurationAppSettings As System.Configuration.AppSettingsReader = New System.Configuration.AppSettingsReader()

HELP

Answer : 'System.Configuration.Conf<wbr />igurationE<wbr />xception' occurred in system.dll

Does a configuration file exist?

The configuration files are in XML.
Is the file STILL well-formed XML, or has it been corrupted in some way?

I put a link to IE6 in my SendTo directory to use for this purpose.  Then you can just right-click the config file, and send it to IE6.  If shows, then it is a well-formed XML doc.  If it complains, there's something wrong.

Is this an executable-hosted app, an ASP.NET hosted app, or a IE-hosted app?  The configuration files will be in different places depending on this.

Is the config file small enough to post for us?
(Remove any passwords or securable info.)