CustomerDetailsViewModel.cs

namespace MongoDBApp.ViewModels
{

    [ImplementPropertyChanged]
    public class CustomerDetailsViewModel : IPageViewModel, IAsyncInitialization
    {
  

        public CustomerDetailsViewModel(IDataService<CustomerModel> customerDataService, IDataService<Country> countryDataService, IDialogService dialogService) 
        {
            this._customerDataService = customerDataService;
            this._countryDataService = countryDataService;
            this._dialogService = dialogService;

            Initialization = GetAllCustomersAsync();

            IsEnabled = true;
        
        }

      #region Properties
       
        
        public CustomerModel SelectedCustomer  { get; set; }
        
        public ObservableCollection<CustomerModel> Customers { get; set; }

        public ObservableCollection<Country> Countries { get; set; }
    
        public Task Initialization { get; private set; }
       

      
        private async Task GetAllCustomersAsync()
        {
            var customerResult = await _customerDataService.GetAllAsync();
            Customers = customerResult.ToObservableCollection();

            var countryResult = await _countryDataService.GetAllAsync();
            Countries = countryResult.ToObservableCollection();
        }

    
        #endregion
    }
}