读取【程序名称.exe.config】配置文件

  public static void loadConfigFile()
        {
            ExeConfigurationFileMap file = new ExeConfigurationFileMap();
            file.ExeConfigFilename = Application.StartupPath + "\\PermissionAllocator.exe.config";
            Program.Config = ConfigurationManager.OpenMappedExeConfiguration(file, ConfigurationUserLevel.None);
        }
        public static Configuration Config { get; private set; }

  private string createConnectionString()
        {
            return Program.Config.ConnectionStrings.ConnectionStrings["db"].ConnectionString;
        }