“System.Configuration.ConfigurationSettings.AppSettings”已过时

  <appSettings>
    <add key="HotelOpenDay" value="2013-04-30"></add>
    <add key="HotelColseTime" value="18"></add>
  </appSettings>

读取数据出错的代码

            HotelOpenDay = Convert.ToDateTime(System.Configuration.ConfigurationSettings.AppSettings["HotelOpenDay"]);
            HotelCloseTime = Convert.ToInt32(System.Configuration.ConfigurationSettings.AppSettings["HotelCloseTime"]);

上面的代代码改为：

            HotelOpenDay = Convert.ToDateTime(System.Configuration.ConfigurationManager.AppSettings["HotelOpenDay"]);
            HotelCloseTime = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["HotelCloseTime"]);