读

this.txtOutPutPath.Text = ConfigurationManager.AppSettings["OutPutPath"];            this.txtFilter.Text = ConfigurationManager.AppSettings["Filter"];

写

Configuration configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);                configuration.AppSettings.Settings["OutPutPath"].Value = this.txtOutPutPath.Text;                configuration.AppSettings.Settings["Filter"].Value = this.txtFilter.Text;                //保存配置文件                configuration.Save();                ConfigurationManager.RefreshSection("appSettings"); // 实时刷新