public override async void OnNavigatedTo(NavigatedToEventArgs e, Dictionary <string, object> viewModelState)
{
base.OnNavigatedTo(e, viewModelState);
Contacts = null;
_contactsCount = await OfficeService.GetContactsCount();
await GetFirstPage();
}
private async void OnInitialize(object parameter)
{
GetEvent <InitDialogEvent>().Unsubscribe(OnInitialize);
Contacts = null;
_contactsCount = await OfficeService.GetContactsCount();
await GetFirstPage();
}