namespace Express.Common

{

    class ReadFile

    {

        [DllImport("kernel32")] //引入“shell32.dll”API文件

        public static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

        public ReadFile()

        {

        }

        /// <summary>

        /// 从INI文件中读取指定节点的内容

        /// </summary>

        /// <param name="section">INI节点</param>

        /// <param name="key">节点下的项</param>

        /// <param name="def">没有找到内容时返回的默认值</param>

        /// <param name="filePath">要读取的INI文件</param>

        /// <returns>读取的节点内容</returns>

        public static string GetIniFileString(string section, string key, string def, string filePath)

        {

            StringBuilder temp = new StringBuilder(1024);

            GetPrivateProfileString(section, key, def, temp, 1024, filePath);

            return temp.ToString();

        }

    }

}

看不懂