private void GetSpecialists()
        {
            var selectedLocalization   = (Location)this.Localizations.SelectedIndex;
            var selectedSpecialization = (Specialization)this.Specializations.SelectedIndex;

            if (selectedLocalization < 0 || selectedSpecialization < 0)
            {
                return;
            }

            var specialistsService = new SpecialistsService();
            var specialists        = specialistsService.GetSpecialistsByLocationAndSpecialization
                                         (selectedLocalization, selectedSpecialization).ToList();

            this._currentSpecialists     = specialists;
            this.Specialists.ItemsSource = specialists.Select(x => $"{x.FullName}");
        }