[DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retvalue, int siz, string inipath);
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
        
 

        private static string m_iniPath = System.Windows.Forms.Application.StartupPath + "\\config.ini";//配置路徑


        //寫INI檔案     
        public static void IniWriteValue(string Section, string Key, string Value)    
        {

            WritePrivateProfileString(Section, Key, Value, m_iniPath);

        }



        //讀取INI檔案指定     
        public static string IniReadValue(string Section, string Key)

        {
            StringBuilder temp = new StringBuilder(255);

            int i = GetPrivateProfileString(Section, Key, "", temp, 255, m_iniPath);

            return temp.ToString();

        }
 

以上為Config類檔案內。

       Config.IniWriteValue("UserName", "account", account);//寫入密碼不加密
       private string passwdKey = "asfafagsgdsgkhk"; //加密的祕鑰</span>
       StringBuilder ps = new StringBuilder();
       for (int i = 0; i < passwd.Length; ++i)
       {
          int c = passwd[i] ^ passwdKey[i];   //異或加密,使用int儲存
          ps.Append(c + " ");
       }
        Config.IniWriteValue("PassWord", "passwd", ps.ToString());
        string account = Config.IniReadValue("UserName", "account");                
        string passwd = Config.IniReadValue("PassWord", "passwd");
 

//讀取密碼需要解密

               string[] ps = passwd.Split(' ');

                StringBuilder sb = new StringBuilder();

                for (int i = 0; i < ps.Length; i++)

                {

                    sb.Append((char)(passwdKey[i] ^ int.Parse(ps[i]))); //異或解密， 轉換成char

                }  

passwd = sb.ToString();