public ContentCurlVModel()
{
// load IPAddress and UserAgent data
IPManager.Load(App.FileIPAddressXml);
UAManager.Load(App.FileUserAgentXml);
SiteManager.Load(App.FileCurlXml);
// load curl data
SiteListOC = new ObservableCollection <SiteProfile>(SiteManager.SiteList);
// set list display grouping
CollectionView collectionView = (CollectionView)CollectionViewSource.GetDefaultView(SiteListOC);
PropertyGroupDescription groupDescription = new PropertyGroupDescription("Website");
collectionView.GroupDescriptions.Add(groupDescription);
}