<configSections>
<section name="HostInfo" type="System.Configuration.SingleTagSectionHandler"/>
</configSections>
IDictionary hostSetting = (IDictionary)ConfigurationManager.GetSection("HostInfo");
//IDictionary hostSetting = (IDictionary)ConfigurationSettings.GetConfig("HostInfo");
string hostName = (string)hostSetting["hostname"];
int port =Convert.ToInt16(hostSetting["port"]);