配置文件的读写

1  Configuration config = System.Configuration.ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
2  config.AppSettings.Settings.Remove("sqlStr");
3  config.AppSettings.Settings.Add("sqlStr", sqlStr);
4  //一定要记得保存，写不带参数的config.Save()也可以 
5  config.Save(ConfigurationSaveMode.Modified);
6  //刷新，否则程序读取的还是之前的值（可能已装入内存）
7  System.Configuration.ConfigurationManager.RefreshSection("appSettings");

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1 string value = config.AppSettings.Settings[key].Value;

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