public MainViewModel()
{
// set some views
_llosView = new VisibilityLLOSView();
_llosView.DataContext = new LLOSViewModel();
_rlosView = new VisibilityRLOSView();
_rlosView.DataContext = new RLOSViewModel();
Events_ActiveViewChanged();
// listen to some map events
ArcMap.Events.ActiveViewChanged += Events_ActiveViewChanged;
VisibilityConfig.AddInConfig.LoadConfiguration();
}