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.net读写config appsetting

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

    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

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