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方法如下：

如果是WinForm程序，需要添加引用：

• System.ServiceModel
• System.Configuration

App.config

<?xml version="1.0" encoding="utf-8" ?><configuration> <appSettings> <add key="testkey" value="0"></add> </appSettings></configuration>

NetUtilityLib

using System.Configuration;namespace pcauto{ public static class ConfigHelper { ///<summary> ///返回*.exe.config文件中appSettings配置节的value项 ///</summary> ///<param name="strKey"></param> ///<returns></returns> public static string GetAppConfig(string strKey) { string file = System.Windows.Forms.Application.ExecutablePath; Configuration config = ConfigurationManager.OpenExeConfiguration(file); foreach (string key in config.AppSettings.Settings.AllKeys) { if (key == strKey) { return config.AppSettings.Settings[strKey].Value.ToString(); } } return null; } ///<summary> ///在*.exe.config文件中appSettings配置节增加一对键值对 ///</summary> ///<param name="newKey"></param> ///<param name="newValue"></param> public static void UpdateAppConfig(string newKey, string newValue) { string file = System.Windows.Forms.Application.ExecutablePath; Configuration config = ConfigurationManager.OpenExeConfiguration(file); bool exist = false; foreach (string key in config.AppSettings.Settings.AllKeys) { if (key == newKey) { exist = true; } } if (exist) { config.AppSettings.Settings.Remove(newKey); } config.AppSettings.Settings.Add(newKey, newValue); config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection("appSettings"); } }}

读示例

ConfigHelper.GetAppConfig("testkey")

写示例

ConfigHelper.UpdateAppConfig("testkey", "abc");

总结

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