If it's a setting that is per user, it should be saved in user accessible storage areas such as Isolated Storage. If a one time setting after installation, it should be asked as part of the installation process, which is run with Administrator rights.

>Hi all,
>
>I have an WPF app tha should run in a client machine after depoying it. The issue is that there are some properties like the DefaultLanguage, in the app.config file, that clients should be able to change. After deploying only if the app is Run as Administrator the app.config file is changed, otherwise it crashes.
>
>Any idea of how can I access the app.config file from a method?
>
>Thanks.