public CurrenciesViewModel()
{
instance = this;
this.apiService = new ApiService();
this.dataService = new DataService();
this.LoadCurrencies();
this.IsRefreshing = false;
}
private static CurrenciesViewModel instance; // Atributo
public static CurrenciesViewModel GetInstance()
{
if (instance == null)
{
instance = new CurrenciesViewModel();
}
return(instance);
}