C#操作ini配置文件代码【转】

public static class WinAPI
    {
        [DllImport("kernel32")] // 写入配置文件的接口
        private static extern long WritePrivateProfileString(
        string section, string key, string val, string filePath);
        [DllImport("kernel32")] // 读取配置文件的接口
        private static extern int GetPrivateProfileString(
        string section, string key, string def,
        StringBuilder retVal, int size, string filePath);
        // 向配置文件写入值
        public static void ProfileWriteValue(
        string section, string key, string value, string path)
        {
            WritePrivateProfileString(section, key, value, path);
        }
        // 读取配置文件的值
        public static string ProfileReadValue(
        string section, string key, string path)
        {
            StringBuilder sb = new StringBuilder(255);
            GetPrivateProfileString(section, key, "", sb, 255, path);
            return sb.ToString().Trim();
        }
    }

//配置文件位置
string configpath = AppDomain.CurrentDomain.BaseDirectory + "config.ini";
//写入配置
WinAPI.ProfileWriteValue("Setting", "DefaultSerialPort", ssp.SL_PortName, configpath);
//读取配置
WinAPI.ProfileReadValue("Setting", "DefaultSerialPort", configpath);

//判断是否存在配置文件
if (!File.Exists(configpath))
{
   FileStream fs = new FileStream(configpath, FileMode.OpenOrCreate);
}