private void RefreshStreets(CityDto city, ServiceCompanyDto company)
 {
     StreetList.Clear();
     if (city == null)
     {
         return;
     }
     RequestService.GetStreets(city.Id, company?.Id).ToList().ForEach(s => StreetList.Add(s));
 }
 private void ChangeCity(int?cityId)
 {
     StreetList.Clear();
     if (!cityId.HasValue)
     {
         return;
     }
     foreach (var street in _requestService.GetStreets(cityId.Value).OrderBy(s => s.Name))
     {
         StreetList.Add(street);
     }
     OnPropertyChanged(nameof(StreetList));
 }