public EventsViewModel(Page page, Group @group) : base(page)
 {
     groupId = group.Id.ToString();
     GroupName = group.Name;
     Events = new ObservableCollection<Event>();
     EventsGrouped = new ObservableCollection<Grouping<string, Event>>();
 }
 private void ExecuteGoToGroupCommand(Group e)
 {
     ShowViewModel<EventsViewModel>(new {id = e.Id, groupName = e.Name});
 }