public Startup()
{
var mine = new List<RoleModel>();
mine.Add(new RoleModel { Id = 0, Name = "anca"});
mine.Add(new RoleModel { Id = 1, Name = "test1" });
mine.Add(new RoleModel { Id = 2, Name = "test2" });
mine.Add(new RoleModel { Id = 3, Name = "test3" });
RoleViewModel roleViewModel = new RoleViewModel(mine);
var main = new MainWindow();
main.DataContext = roleViewModel;
main.ShowDialog();
var test = roleViewModel.selectedRoles;
}