public CollectionFactory(Application app, ISquadRepository squadRepository)
{
_app = app;
NationViewModels = squadRepository.GetNations().Select(n => new ComboBoxItemViewModel(n.Id, n.Name)).ToList();
CityViewModels = squadRepository.GetCities().Select(n => new ComboBoxItemViewModel(n.Id, n.Name)).ToList();
SportViewModels = squadRepository.GetSports().Select(n => new ComboBoxItemViewModel(n.Id, n.Name)).ToList();
PositionRoles = Enum.GetValues(typeof(PositionRole)).Cast <PositionRole>().ToList(); //.Select(pr => new ComboBoxItemViewModel((int)pr, pr.ToString())).ToList();
}