ExeConfigurationFileMap map = new ExeConfigurationFileMap();             map.ExeConfigFilename = @"F:App1.config"; ;             Configuration config = ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);             string connstr = config.ConnectionStrings.ConnectionStrings["connStr"].ConnectionString;             MessageBox.Show(connstr);             string key = config.AppSettings.Settings["key"].Value;             MessageBox.Show(key);