class NetUtil
    {
        public static async Task<List<Curs>> initializeazaCurs()
        {
            HttpClient httpClient = new HttpClient();
            HttpResponseMessage response = await httpClient.GetAsync("https://bnr.ro/nbrfxrates.xml");
            Stream responseBody = await response.Content.ReadAsStreamAsync();
            List<Curs> listaCursuri = preiaCursDinXML(responseBody);
            return listaCursuri;
        }

        private static List<Curs> preiaCursDinXML(Stream streamXML)
        {
            List<Curs> listaCursuri = new List<Curs>();
            XmlReader reader = XmlReader.Create(streamXML);
            string dataXML = "";
            while (reader.Read())
            {
                if (reader.IsStartElement())
                {
                    switch (reader.Name.ToString())
                    {
                        case "Cube":
                            dataXML = reader["date"];
                            break;
                        case "Rate":
                            Curs cursValutar = new Curs();
                            cursValutar.DATA = dataXML;
                            cursValutar.VALUTA = reader["currency"];
                            if(reader["multiplier"]!=null)
                            {
                                cursValutar.MULTIPLICATOR = Int32.Parse(reader["multiplier"]);
                            }
                            else
                            {
                                cursValutar.MULTIPLICATOR = 1;
                            }
                            reader.Read();
                            cursValutar.VALOARE = (double.Parse(reader.Value))/10000;
                            listaCursuri.Add(cursValutar);
                            break;
                    }
                }
            }

            return listaCursuri;
        }
    }

// METODA MAIN ONAPPEARING

protected override async void OnAppearing()
        {
            base.OnAppearing();
            listaCursuri = await NetUtil.initializeazaCurs();
            lvCurs.ItemsSource = listaCursuri;
            BindingContext = this;