private async void Image_Tap(object sender, RoutedEventArgs e)
{
if (MessageBox.Show("Ceci va retirer cet ami. Continuer?", "Suppression", MessageBoxButton.OKCancel) == MessageBoxResult.OK)
{
System.Diagnostics.Debug.WriteLine("removing");
await WeBallAPI.eraseRelationship((string)(((Button)sender).CommandParameter));
(Application.Current.RootVisual as PhoneApplicationFrame).Navigate(new Uri("/ProfilePage.xaml", UriKind.Relative));
}
}