public SettingsViewModel()
{
Tabs = new ObservableCollection <TabItem>();
var catalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
var container = new CompositionContainer(catalog);
container.ComposeParts(this);
foreach (var customTabControl in TabCollection.OrderBy(tab => tab.Order).Where(t => t.Settings != null))
{
Tabs.Add(new TabItem()
{
Header = customTabControl.Header, Content = customTabControl.Settings
});
}
}