public ProjectSelectorViewModel(
ProjectRepository projectRepository,
Func<Project,SprintSelectorViewModel> sprintSelectorFactory,
IShell shell
)
{
_projectRepository = projectRepository;
_sprintSelectorFactory = sprintSelectorFactory;
_shell = shell;
_projectRepository.GetAllObservable().
ToProperty(this, t => t.AllProjects, out _allProjects);
}