private SP.HtmlElement GetSettingWithKeyAndValue(SP.HtmlElement appSettings, string settingName, string settingValue)
 {
     return (from SP.HtmlElement item in appSettings.Nodes
             where item.Attributes["value"].Value == settingValue
             && item.Attributes["key"].Value == settingName
             select item).First();
 }
 private SP.HtmlElement GetAppSettings(SP.HtmlElement RootNode)
 {
     var TopLevelNodes = from SP.HtmlElement item in RootNode.Nodes select item;
     var AppSettings = (from SP.HtmlElement item in TopLevelNodes
                        where item.Name == "appSettings"
                        select item).FirstOrDefault();
     return AppSettings;
 }