public void AddConcertToList ()
{
Concert concertToAdd = new Concert(addConcert);
listConcert.Add(concertToAdd);
}
public async Task setAsyncConcertToBD(ObservableCollection<Concert> listConcert)
{
foreach (var concert in listConcert)
{
Concert newConcert = new Concert(idMusicianToAdd, concert.ConcertAvenir1);
var urlStringConcert = new Uri("http://webapiphone.azurewebsites.net/api/concertavenirs/InsererConcert");
HttpClient client = new HttpClient();
await client.PostAsJsonAsync<Concert>(urlStringConcert,newConcert);
}
}