private async void Find_Apartments_by_Persons_Button_Click(object sender, RoutedEventArgs e)
        {
            int ListBox_Persons_SelectedItems_Count = ListBox_Persons.SelectedItems.Count;

            Task <List <PersonModel> > allPersons = personService.GetAllPersons();
            await allPersons;

            //string s = "Name2";


            List <PersonModel> allPersonsResult = allPersons.Result;


            if (ListBox_Persons.SelectedItems.Count == 0)
            {
                TextBox_OutPut.Text = "There are no selected Persons";
                MessageBox.Show("There are no selected Persons");
            }
            else
            {
                TextBox_OutPut.Text = "";

                List <ApartmentModel> apartments         = new List <ApartmentModel>();
                List <string>         apartmentsToString = new List <string>();

                foreach (string selectedItem in ListBox_Persons.SelectedItems)
                {
                    TextBox_OutPut.Text = selectedItem.ToString();
                    Task <PersonModel> somePerson = personService.FindPersonByName(selectedItem.ToString());
                    await somePerson;

                    Task <List <ApartmentModel> > apartmentsByPersonId = apartmentService.GetApartmentsByPersonId(somePerson.Result.Id);
                    await apartmentsByPersonId;

                    //apartments.AddRange(apartmentsByPersonId.Result);
                    foreach (ApartmentModel ap in apartmentsByPersonId.Result)
                    {
                        apartments.Add(ap);
                    }


                    //if (selectedItem.ToString() == "Name2")
                    //{
                    //    TextBox_OutPut.Text = "Got it.";
                    //}
                }

                foreach (var apartment in apartments)
                {
                    BuildingModel        bm     = new BuildingModel();
                    Task <BuildingModel> bmTask = buildingService.GetByIdAsync(apartment.BuildingId);
                    await bmTask;
                    bm = bmTask.Result;


                    PersonModel        pm     = new PersonModel();
                    Task <PersonModel> pmTask = personService.GetByIdAsync(apartment.PersonId);
                    await pmTask;
                    pm = pmTask.Result;

                    TextBox_OutPut.Text = pm.Name + "                         777";
                    apartmentsToString.Add($"Building: {bm.BuildingNumber}, Apartment Number: {apartment.ApartmentNumber}, Own: {apartment.IsOwn}, Owner: {pm.Name}, Phone: {pm.PhoneNumber.ToString()}, OrderDate: {apartment.OrderDate}");
                    //apartmentsToString.Add("1");
                }
                ListBox_OutPut.ItemsSource = null;
                ListBox_OutPut.ItemsSource = apartmentsToString;
            }
        }