Thanks Craig,

The issue is that I need someway to change some AppSettings in the app.exe.config file, when the app is placed in the Program Files folder.
I have written this method to do it:

        public static void ReplaceAppSetting(String key, String value, ConfigurationUserLevel level)
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(level);
            AppSettingsSection appSection = config.AppSettings;

            if (appSection.Settings.AllKeys.Contains(key))
            {
                appSection.Settings[key].Value = value;
                config.Save(ConfigurationSaveMode.Modified);
            }
            else
            {
                AddAppSetting(key, value);
            }
        }

Usually users have administration rights but the app should be run as administrator, if not the config.Save() method fails.

I´m trying to deal with the ConfiurationPermission class but I cannot güess how to program it to an unrestricted access.

Any Idea??

Thanks.